https://tools.woot.com/offers/zone-tech-ts0006-heavy-duty-rubber-parking-guide-21-2pk-8 2-Pack Zone Tech 21" Heavy Duty Rubber Parking Guides (TS0006) on sale for $22.99 - 10% with coupon code GARAGE10 at checkout = $20.69. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order