Amazon takes $2.50 off Rain-X Latitude 8-In-1 Premium Graphite Coated Wiper Blades when you clip the coupon on the product page. Plus, Prime members get free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping adds around $6.) That's the best deal we've seen on Rain-X wiper blades since March, when Walmart had them for $0 after rebate. Sales tax is added where applicable. They come in 16" (for $10.71 after discount) to 28" (for $15.52 after coupon; select your size from the drop-down menu.)