Advance Auto Parts has Rain-X Spot Free Car Wash (48-oz.) for $10.49 - $10.49 Mail-In Rebate = Free with free in-store pickup. Note: Rebate is in the form of an Advance Auto Parts Gift Card.
I was able to order online and pick up in store for a total cost of 11.43 which makes the final cost 44 cents. The rebate is processed online so no stamps to take away from your rebate.
Advance Auto Parts: Car, Engine, Batteries, Brakes, Replacement, Performance & Accessories