[minor] fix setup wizard buying_items query
diff --git a/erpnext/setup/page/setup_wizard/sample_data.py b/erpnext/setup/page/setup_wizard/sample_data.py
index b90cceb..2cebc91 100644
--- a/erpnext/setup/page/setup_wizard/sample_data.py
+++ b/erpnext/setup/page/setup_wizard/sample_data.py
@@ -12,7 +12,7 @@
 	to help the user get started"""
 
 	selling_items = frappe.get_all("Item", filters = {"is_sales_item": 1})
-	buying_items = frappe.get_all("Item", filters = {"is_sales_item": 0})
+	buying_items = frappe.get_all("Item", filters = {"is_purchase_item": 1})
 
 	if selling_items:
 		for i in range(3):