diff --git a/components/Rect.lua b/components/Rect.lua
new file mode 100644
index 0000000..9e036bf
--- /dev/null
+++ b/components/Rect.lua
@@ -0,0 +1,22 @@
+local Solyd = require("modules.solyd")
+local hooks = require("modules.hooks")
+local useCanvas = hooks.useCanvas
+
+return Solyd.wrapComponent("Rect", function(props)
+    local canvas = useCanvas(props.display, props.width, props.height)--Solyd.useContext("canvas")
+
+    Solyd.useEffect(function()
+        if props.color then
+            for x = 1, props.width do
+                for y = 1, props.height do
+                    canvas:setPixel(x, y, props.color)
+                end
+            end
+        end
+        return function()
+            canvas:markRect(1, 1, props.width, props.height)
+        end
+    end, { canvas, props.display, props.x, props.y, props.width, props.height, props.color })
+
+    return nil, { canvas = { canvas, props.x, props.y } }
+end)
diff --git a/config.lua b/config.lua
index 365fb48..a3540d4 100644
--- a/config.lua
+++ b/config.lua
@@ -2,6 +2,10 @@
     branding = {
         title = "Radon Shop"
     },
+    settings = {
+        hideUnavailableProducts = false,
+        pollFrequency = 30
+    },
     theme = {
         formatting = {
             headerAlign = "center",
diff --git a/core/ConfigValidator.lua b/core/ConfigValidator.lua
index f458772..bd925bd 100644
--- a/core/ConfigValidator.lua
+++ b/core/ConfigValidator.lua
@@ -4,6 +4,10 @@
     branding = {
         title = "string"
     },
+    settings = {
+        hideUnavailableProducts = "boolean",
+        pollFrequency = "number",
+    },
     theme = {
         formatting = {
             headerAlign = "enum<'left' | 'center' | 'right'>: alignment",
diff --git a/core/ShopState.lua b/core/ShopState.lua
index 26e9019..ade921e 100644
--- a/core/ShopState.lua
+++ b/core/ShopState.lua
@@ -1,4 +1,5 @@
 local Krypton = require("Krypton")
+local ScanInventory = require("core.inventory.ScanInventory")
 
 ---@class ShopState
 ---@field running boolean
@@ -48,6 +49,11 @@
             local event, transaction = os.pullEvent("transaction")
             --print("Received transaction on " .. transaction.source)
         end
+    end, function()
+        while state.running do
+            ScanInventory.updateProductInventory(state.products)
+            sleep(state.config.settings.pollFrequency)
+        end
     end)
 end
 
diff --git a/core/inventory/ScanInventory.lua b/core/inventory/ScanInventory.lua
new file mode 100644
index 0000000..2d2abbc
--- /dev/null
+++ b/core/inventory/ScanInventory.lua
@@ -0,0 +1,145 @@
+local itemCache = {}
+
+local function getInventories()
+    peripherals = peripheral.getNames()
+    inventories = {}
+    for i = 1, #peripherals do
+        name = peripherals[i]
+        local methods = peripheral.getMethods(name)
+        local hasListItems = false
+        local hasPushItems = false
+        if methods then
+            for i = 1, #methods do
+                if methods[i] == "list" then
+                    hasListItems = true
+                end
+                if methods[i] == "pushItems" then
+                    hasPushItems = true
+                end
+                if hasListItems and hasPushItems then
+                    break
+                end
+            end
+        end
+        if hasListItems and hasPushItems then
+            table.insert(inventories, peripheral.wrap(name))
+        end
+    end
+    return inventories
+end
+
+local function getInventoryItems(inventory)
+    local inventoryName = peripheral.getName(inventory)
+    local items = {}
+    local slots = inventory.list()
+    for slot, item in pairs(slots) do
+        if item then
+            item.inventory = inventoryName
+            item.slot = slot
+            table.insert(items, item)
+        end
+    end
+    return items
+end
+
+local function getAllInventoryItems(inventories)
+    local items = {}
+    for i = 1, #inventories do
+        local inventory = inventories[i]
+        local inventoryItems = getInventoryItems(inventory)
+        for i = 1, #inventoryItems do
+            table.insert(items, inventoryItems[i])
+        end
+    end
+    return items
+end
+
+local partialObjectMatches
+local function partialArrayMatches(partialArray, array)
+    for i = 1, #partialArray do
+        local found = false
+        for i = 1, #array do
+            if type(array[i]) == "table" then
+                if partialObjectMatches(partialArray[i], array[i]) then
+                    found = true
+                    break
+                end
+            elseif partialArray[i] == array[i] then
+                found = true
+                break
+            end
+        end
+        if not found then
+            return false
+        end
+    end
+    return true
+end
+
+function partialObjectMatches(partialObject, object)
+    if type(object) ~= "table" then
+        return false
+    end
+    if object[1] then
+        return partialArrayMatches(partialObject, object)
+    end
+    for k,v in pairs(partialObject) do
+        if type(v) == "table" then
+            if not partialObjectMatches(v, object[k]) then
+                return false
+            end
+        elseif object[k] == nil or object[k] ~= v then
+            return false
+        end
+    end
+    return true
+end
+
+local function predicateMatches(predicates, item)
+    local meta = peripheral.call(item.inventory, "getItemMeta", item.slot)
+    return partialObjectMatches(predicates, meta)
+end
+
+local function findMatchingProducts(products, item)
+    local matchingProducts = {}
+    for i = 1, #products do
+        local product = products[i]
+        if item.name == product.modid then
+            if not product.predicates or predicateMatches(product.predicates, item) then
+                table.insert(matchingProducts, product)
+            end
+        end
+    end
+    return matchingProducts
+end
+
+local function updateProductInventory(products)
+    for i = 1, #products do
+        products[i].newQty = 0
+    end
+    local inventories = getInventories()
+    local items = getAllInventoryItems(inventories)
+    itemCache = items
+    for i = 1, #items do
+        local item = items[i]
+        local matchingProducts = findMatchingProducts(products, item)
+        for i = 1, #matchingProducts do
+            local product = matchingProducts[i]
+            product.newQty = product.newQty + item.count
+        end
+    end
+    for i = 1, #products do
+        local product = products[i]
+        product.quantity = product.newQty
+        product.newQty = nil
+    end
+end
+
+local function getItemCache()
+    return itemCache
+end
+
+return {
+    updateProductInventory = updateProductInventory,
+    getItemCache = getItemCache
+}
\ No newline at end of file
diff --git a/modules/canvas.lua b/modules/canvas.lua
index 1bf2cc9..82c43b4 100644
--- a/modules/canvas.lua
+++ b/modules/canvas.lua
@@ -545,7 +545,11 @@
         for x, _ in pairs(row) do
             local targetX = ceil(x / 2)
             local currPixel = self.pixelCanvas.canvas[y][x]
-            local partition = partitions[floor(y/partitionSize)+1][floor(x/partitionSize)+1]
+            partitionY = math.min(floor(y/partitionSize)+1, #partitions)
+            partitionX = math.min(floor(x/partitionSize)+1, #partitions[1])
+            --print("getting partition (partizion size " .. partitionSize .. ") at x: " .. x .. ", y: " .. y .. " -> ".. floor(x/partitionSize)+1 .. ", " .. floor(y/partitionSize)+1)
+            --print("Partitions size: " .. #partitions[1] .. ", " .. #partitions)
+            local partition = partitions[partitionY][partitionX]
 
             local found = false
             -- local foundText = false
diff --git a/products.lua b/products.lua
index 05d05cc..9f39985 100644
--- a/products.lua
+++ b/products.lua
@@ -1,14 +1,13 @@
 return {
     {
-        modid = "minecraft:lapis_lazuli",
-        name = "Lapis Lazuli",
+        modid = "minecraft:lapis_block",
+        name = "Lapis Block",
         address = "lapis",
-        price = 1.0,
-        quantity = 999, -- DEBUG ONLY
+        price = 9.0,
         priceOverrides = {
             {
                 currency = "tenebra",
-                price = 1.0
+                price = 18.0
             }
         },
     },
@@ -17,7 +16,6 @@
         name = "Diamond",
         address = "dia",
         price = 5.0,
-        quantity = 0, -- DEBUG ONLY
         priceOverrides = {
             {
                 currency = "tenebra",
@@ -30,7 +28,6 @@
         name = "Gold Ingot",
         address = "gold",
         price = 5.0,
-        quantity = 16, -- DEBUG ONLY
         priceOverrides = {
             {
                 currency = "tenebra",
@@ -43,14 +40,18 @@
         name = "Diamond Pickaxe eff5",
         address = "dpick",
         price = 50.0,
-        quantity = 4,
         predicates = {
             enchantments = {
                 {
-                    fullName = "Efficiency",
-                    level = 5
+                    fullName = "Efficiency V"
                 }
             }
         }
+    },
+    {
+        modid = "scgoodies:lesbian_elytra",
+        name = "Lesbian Elytra",
+        address = "lely",
+        price = 5000.0
     }
 }
\ No newline at end of file
diff --git a/radon.lua b/radon.lua
index 969e42b..e40c56c 100644
--- a/radon.lua
+++ b/radon.lua
@@ -12,6 +12,7 @@
 local SmolText = require("components.SmolText")
 local smolFont = require("fonts.smolfont")
 local BasicText = require("components.BasicText")
+local Rect = require("components.Rect")
 local RenderCanvas = require("components.RenderCanvas")
 local Core = require("core.ShopState")
 local ShopRunner = require("core.ShopRunner")
@@ -28,11 +29,22 @@
 
 local display = Display.new({theme=config.theme})
 
+local function getDisplayedProducts(allProducts, settings)
+    local displayedProducts = {}
+    for _, product in ipairs(allProducts) do
+        if not settings.hideUnavailableProducts or product.quantity > 0 then
+            table.insert(displayedProducts, product)
+        end
+    end
+    return displayedProducts
+end
+
 local Main = Solyd.wrapComponent("Main", function(props)
     local canvas = useCanvas(display)
     local theme = props.config.theme
 
-    header = BigText { display=display, text="Radon Shop", x=1, y=1, align=theme.formatting.headerAlign, bg=theme.colors.headerBgColor, color = theme.colors.headerColor, width=display.bgCanvas.width }
+    local header = BigText { display=display, text="Radon Shop", x=1, y=1, align=theme.formatting.headerAlign, bg=theme.colors.headerBgColor, color = theme.colors.headerColor, width=display.bgCanvas.width }
+
 
     local flatCanvas = {
         header
@@ -41,7 +53,7 @@
     local maxAddrWidth = 0
     local maxQtyWidth = 0
     local maxPriceWidth = 0
-    local shopProducts = props.shopState.products
+    local shopProducts = getDisplayedProducts(props.shopState.products, config.settings)
     local productsHeight = display.bgCanvas.height - 17
     local heightPerProduct = math.floor(productsHeight / #shopProducts)
     local productTextSize
@@ -57,8 +69,13 @@
         productTextSize = theme.formatting.productTextSize
     end
 
+    if #shopProducts > 0 then
+        table.insert(flatCanvas, Rect { display=display, x=1, y=16, width=display.bgCanvas.width, height=1, color=theme.colors.productBgColor })
+    end
+
     for i = 1, #shopProducts do
         local product = shopProducts[i]
+        product.quantity = product.quantity or 0
         if productTextSize == "large" then
             maxAddrWidth = math.max(maxAddrWidth, bigFont:getWidth(product.address .. "@")+2)
             maxQtyWidth = math.max(maxQtyWidth, bigFont:getWidth(tostring(product.quantity))+4)
@@ -93,24 +110,25 @@
             table.insert(flatCanvas, BigText { display=display, text=tostring(product.quantity), x=1, y=17+((i-1)*15), align="center", bg=theme.colors.productBgColor, color=qtyColor, width=maxQtyWidth })
             table.insert(flatCanvas, BigText { display=display, text=product.name, x=maxQtyWidth+1, y=17+((i-1)*15), align=theme.formatting.productNameAlign, bg=theme.colors.productBgColor, color=productNameColor, width=display.bgCanvas.width-3-maxAddrWidth-maxPriceWidth-maxQtyWidth })
             table.insert(flatCanvas, BigText { display=display, text=tostring(product.price) .. "kst", x=display.bgCanvas.width-3-maxAddrWidth-maxPriceWidth, y=17+((i-1)*15), align="right", bg=theme.colors.productBgColor, color=theme.colors.priceColor, width=maxPriceWidth })
-            table.insert(flatCanvas, BigText { display=display, text=product.address .. "@", x=display.bgCanvas.width-3-maxAddrWidth, y=17+((i-1)*15), align="center", bg=theme.colors.productBgColor, color=theme.colors.addressColor, width=maxAddrWidth+6 })
+            table.insert(flatCanvas, BigText { display=display, text=product.address .. "@", x=display.bgCanvas.width-3-maxAddrWidth, y=17+((i-1)*15), align="right", bg=theme.colors.productBgColor, color=theme.colors.addressColor, width=maxAddrWidth+4 })
         elseif productTextSize == "medium" then
             table.insert(flatCanvas, SmolText { display=display, text=tostring(product.quantity), x=1, y=17+((i-1)*9), align="center", bg=theme.colors.productBgColor, color=qtyColor, width=maxQtyWidth })
             table.insert(flatCanvas, SmolText { display=display, text=product.name, x=maxQtyWidth+1, y=17+((i-1)*9), align=theme.formatting.productNameAlign, bg=theme.colors.productBgColor, color=productNameColor, width=display.bgCanvas.width-3-maxAddrWidth-maxPriceWidth-maxQtyWidth })
             table.insert(flatCanvas, SmolText { display=display, text=tostring(product.price) .. "kst", x=display.bgCanvas.width-3-maxAddrWidth-maxPriceWidth, y=17+((i-1)*9), align="right", bg=theme.colors.productBgColor, color=theme.colors.priceColor, width=maxPriceWidth })
-            table.insert(flatCanvas, SmolText { display=display, text=product.address .. "@", x=display.bgCanvas.width-3-maxAddrWidth, y=17+((i-1)*9), align="center", bg=theme.colors.productBgColor, color=theme.colors.addressColor, width=maxAddrWidth+6 })
+            table.insert(flatCanvas, SmolText { display=display, text=product.address .. "@", x=display.bgCanvas.width-3-maxAddrWidth, y=17+((i-1)*9), align="right", bg=theme.colors.productBgColor, color=theme.colors.addressColor, width=maxAddrWidth+4 })
         else
             table.insert(flatCanvas, BasicText { display=display, text=tostring(product.quantity), x=1, y=6+((i-1)*1), align="center", bg=theme.colors.productBgColor, color=qtyColor, width=maxQtyWidth })
             table.insert(flatCanvas, BasicText { display=display, text=product.name, x=maxQtyWidth+1, y=6+((i-1)*1), align=theme.formatting.productNameAlign, bg=theme.colors.productBgColor, color=productNameColor, width=(display.bgCanvas.width/2)-1-maxAddrWidth-maxPriceWidth-maxQtyWidth })
             table.insert(flatCanvas, BasicText { display=display, text=tostring(product.price) .. "kst", x=(display.bgCanvas.width/2)-1-maxAddrWidth-maxPriceWidth, y=6+((i-1)*1), align="right", bg=theme.colors.productBgColor, color=theme.colors.priceColor, width=maxPriceWidth })
-            table.insert(flatCanvas, BasicText { display=display, text=product.address .. "@", x=(display.bgCanvas.width/2)-1-maxAddrWidth, y=6+((i-1)*1), align="center", bg=theme.colors.productBgColor, color=theme.colors.addressColor, width=maxAddrWidth+6 })
+            table.insert(flatCanvas, BasicText { display=display, text=product.address .. "@  ", x=(display.bgCanvas.width/2)-1-maxAddrWidth, y=6+((i-1)*1), align="right", bg=theme.colors.productBgColor, color=theme.colors.addressColor, width=maxAddrWidth+2 })
         end
     end
 
     return _.flat({ _.flat(flatCanvas) }), {
         canvas = {canvas, 1, 1},
         config = props.config or {},
-        shopState = props.shopState or {}
+        shopState = props.shopState or {},
+        products = props.shopState.products
     }
 end)