feat: off-sale price items in avatar sandbox

thanks Alyx for fixing the store API

js/account/avatar-sandbox.js

@@ -602,6 +602,10 @@ async function LoadItems() {
         document.getElementById('inventory').classList.add('itemgrid')
         if (TabSelected !== 'outfit') {
             Items.assets.forEach(item => {
+                if (item.price === null) {
+                    item.price = false
+                }
+
                 const ItemColumn = document.createElement('div')
                 ItemColumn.classList = 'col-auto'
                 ItemColumn.innerHTML = `
@@ -643,14 +647,6 @@ async function LoadItems() {
                         asset: undefined
                     }
             
-                    if (item.price === 0) {
-                        if (item.sales === 0) {
-                            ItemCache[item.id].price = null
-                        } else {
-                            ItemCache[item.id].price = 0
-                        }
-                    }
-            
                     if (item.type === 'hat') {
                         ItemCache[item.id].accessoryType = item.accessoryType
                     }