diff --git a/core/ShopState.lua b/core/ShopState.lua
index 2351d23..e5d890e 100644
--- a/core/ShopState.lua
+++ b/core/ShopState.lua
@@ -166,7 +166,7 @@
         end
     end
     if self.eventHooks and self.eventHooks.preStockCheck then
-        local allowPurchase, err, errMessage, invisible = eventHook.execute(self.eventHooks.preStockCheck, transaction, productsPurchased, self.products)
+        local allowPurchase, err, errMessage, invisible = eventHook.execute(self.eventHooks.preStockCheck, transaction, productsPurchased, self.products, amountPurchased)
         if allowPurchase == false then
             if not invisible then
                 refund(transactionCurrency, transaction.from, meta, transaction.value, errMessage or self.config.lang.refundDenied, err)
@@ -342,16 +342,7 @@
                             sentMetaname = meta[1]
                         end
                         if sentMetaname then
-                            local success, err = pcall(ShopState.handlePurchase, self, transaction, meta, sentMetaname, transactionCurrency)
-                            if success then
-                                -- Success :D
-                            else
-                                refund(transactionCurrency, transaction.from, meta, transaction.value, self.config.lang.refundError, true)
-                                if self.eventHooks and self.eventHooks.failedPurchase then
-                                    eventHook.execute(self.eventHooks.failedPurchase, transaction, transactionCurrency, nil, self.config.lang.refundError)
-                                end
-                                error(err)
-                            end
+                            os.queueEvent("radon_purchase", transaction, meta, sentMetaname, transactionCurrency)
                         elseif self.config.settings.refundMissingMetaname then
                             if self.config.settings.refundInvalidMetaname then
                                 refund(transactionCurrency, transaction.from, meta, transaction.value, self.config.lang.refundNoProduct, true)
@@ -366,6 +357,22 @@
         end
     end, function()
         while self.running do
+            local event, transaction, meta, sentMetaname, transactionCurrency = os.pullEvent("radon_purchase")
+            if event == "radon_purchase" then
+                local success, err = pcall(ShopState.handlePurchase, self, transaction, meta, sentMetaname, transactionCurrency)
+                if success then
+                    -- Success :D
+                else
+                    refund(transactionCurrency, transaction.from, meta, transaction.value, self.config.lang.refundError, true)
+                    if self.eventHooks and self.eventHooks.failedPurchase then
+                        eventHook.execute(self.eventHooks.failedPurchase, transaction, transactionCurrency, nil, self.config.lang.refundError)
+                    end
+                    error(err)
+                end
+            end
+        end
+    end, function()
+        while self.running do
             local onInventoryRefresh = nil
             if self.eventHooks and self.eventHooks.onInventoryRefresh then
                 onInventoryRefresh = self.eventHooks.onInventoryRefresh
diff --git a/core/inventory/ScanInventory.lua b/core/inventory/ScanInventory.lua
index a5a12c0..55574d0 100644
--- a/core/inventory/ScanInventory.lua
+++ b/core/inventory/ScanInventory.lua
@@ -159,6 +159,10 @@
     products = score.copyDeep(originalProducts)
     local items = getAllInventoryItems(inventories, products)
     itemCache = items
+    if onInventoryRefresh then
+        eventHook.execute(onInventoryRefresh, products, items)
+    end
+
     for i = 1, #products do
         local product = products[i]
         product.predicatesString = nil
@@ -186,9 +190,6 @@
         product.__opaque = true
         originalProducts[i] = product
     end
-    if onInventoryRefresh then
-        eventHook.execute(onInventoryRefresh, products, items)
-    end
 end
 
 local function getItemCache()
diff --git a/eventHooks.lua b/eventHooks.lua
index 49c6c51..aa9c3b8 100644
--- a/eventHooks.lua
+++ b/eventHooks.lua
@@ -4,7 +4,7 @@
     -- If product is nil, product will be selected by the shop,
     -- If product is false, customer will be refunded for no product found.
     -- If product is false and errored is true, customer will be refunded with error message.
-    preStockCheck = nil, -- function(transaction, productsPurchased, products) returns continueTransaction, errored, errorMessage, invisible
+    preStockCheck = nil, -- function(transaction, productsPurchased, products, amountPurchased) returns continueTransaction, errored, errorMessage, invisible
     prePurchase = nil, -- function(product, amount, refundAmount, transaction, transactionCurrency) returns continueTransaction, errored, errorMessage, invisible
     purchase = nil, -- function(product, amount, refundAmount, transaction, transactionCurrency)
     failedPurchase = nil, -- function(transaction, transactionCurrency, product, errorMessage)
diff --git a/radon.lua b/radon.lua
index 3419744..e72f687 100644
--- a/radon.lua
+++ b/radon.lua
@@ -1,4 +1,4 @@
-local version = "1.3.26"
+local version = "1.3.28"
 local configHelpers = require "util.configHelpers"
 local schemas       = require "core.schemas"
 local ScanInventory = require("core.inventory.ScanInventory")