https://sellout.woot.com/offers/frost-king-indoor-shrink-window-kit-42z-2 9-Pack Frost King V73/9H Indoor Shrink Window Kit (42" - 62") on sale for $5. Shipping is free for Amazon Prime Members (must log in with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.