diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 4a106c08e4e8d6af3a78f9879c64a174546d0397..731f64e70e019ad2186872dea2a572231ee7c75d 100755
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -4742,6 +4742,17 @@
       <key>Value</key>
       <integer>200</integer>
     </map>
+    <key>InventoryOutboxMaxStockItemCount</key>
+    <map>
+        <key>Comment</key>
+        <string>Maximum number of items allowed in a stock folder.</string>
+        <key>Persist</key>
+        <integer>0</integer>
+        <key>Type</key>
+        <string>U32</string>
+        <key>Value</key>
+        <integer>200</integer>
+    </map>
     <key>InventorySortOrder</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llinventoryfunctions.cpp b/indra/newview/llinventoryfunctions.cpp
index 3939281d0a2c7f7c63b64fe51a773a9ffbd8e63c..229644bdf99f15ceb7d3f4415c7cb814059c68e8 100755
--- a/indra/newview/llinventoryfunctions.cpp
+++ b/indra/newview/llinventoryfunctions.cpp
@@ -1267,6 +1267,19 @@ bool can_move_item_to_marketplace(const LLInventoryCategory* root_folder, LLInve
             tooltip_msg = LLTrans::getString("TooltipOutboxTooManyObjects", args);
             accept = false;
         }
+        
+        if (move_in_stock)
+        {
+            int stock_size = bundle_size + count_descendants_items(dest_folder->getUUID());
+            if (stock_size > gSavedSettings.getU32("InventoryOutboxMaxStockItemCount"))
+            {
+                LLStringUtil::format_map_t args;
+                U32 amount = gSavedSettings.getU32("InventoryOutboxMaxStockItemCount");
+                args["[AMOUNT]"] = llformat("%d",amount);
+                tooltip_msg = LLTrans::getString("TooltipOutboxTooManyStockItems", args);
+                accept = false;
+            }
+        }
     }
 
     return accept;
@@ -1803,6 +1816,15 @@ bool validate_marketplacelistings(LLInventoryCategory* cat, validation_callback_
                     std::string message = indent + cat->getName() + LLTrans::getString("Marketplace Validation Error Subfolder In Stock");
                     cb(message,depth,LLError::LEVEL_ERROR);
                 }
+                else if ((folder_type == LLFolderType::FT_MARKETPLACE_STOCK) && (item_array->size() > gSavedSettings.getU32("InventoryOutboxMaxStockItemCount")))
+                {
+                    // Report if a stock folder has too many items
+                    result = false;
+                    LLStringUtil::format_map_t args;
+                    args["[AMOUNT]"] = llformat("%d",gSavedSettings.getU32("InventoryOutboxMaxStockItemCount"));
+                    std::string message = indent + cat->getName() + LLTrans::getString("TooltipOutboxTooManyStockItems", args);
+                    cb(message,depth,LLError::LEVEL_ERROR);
+                }
                 else
                 {
                     // Simply print the folder name
diff --git a/indra/newview/skins/default/xui/en/strings.xml b/indra/newview/skins/default/xui/en/strings.xml
index 76f4de14001fd843401552a462669903f800528d..49630adb93aaa219db401f564278f7da322bb864 100755
--- a/indra/newview/skins/default/xui/en/strings.xml
+++ b/indra/newview/skins/default/xui/en/strings.xml
@@ -241,6 +241,7 @@ Please try logging in again in a minute.</string>
     <string name="TooltipOutboxFolderLevels">Depth of nested folders exceeds [AMOUNT]. Decrease the depth of folders-within-folders; box items if necessary.</string>
     <string name="TooltipOutboxTooManyFolders">Subfolder count exceeds [AMOUNT]. Decrease the number of folders in your listing; box items if necessary.</string>
     <string name="TooltipOutboxTooManyObjects">Item count exceeds [AMOUNT]. In order to sell more than [AMOUNT] items in one listing, you must box some of them.</string>
+    <string name="TooltipOutboxTooManyStockItems">Stock folder count exceeds [AMOUNT].</string>
     <string name="TooltipOutboxCannotDropOnRoot">You can only drop items or folders in the ALL tab. Please select that tab and move your item(s) or folder(s) again.</string>
 	<string name="TooltipOutboxNoTransfer">One or more of these objects cannot be sold or transferred</string>
 	<string name="TooltipOutboxNotInInventory">You can only put items from your inventory on the marketplace</string>