Rain-X 2 in 1 Exterior Detailer -- $6.97 each. Rain-X Water Repelling Fast Wax -- $6.97 each. Rain-X Waterless Car Wash & Rain Repellent --$6.97 each. Buy one of each for a pre-coupon price of $20.91, then submit for this mail-in rebate . All three will be FREE! This would a make a great gift for Father's Day or someone just getting a car too!