Meritline.com offers the 15" Notebook Keyboard Protector for $2.99. Coupon code "MLCK263999041280NL1" cuts it to 69 cents. With free shipping, that's tied with last month's mention and the lowest total price we could find for a similar keyboard protector by $5. It's made from polyurethane and fits laptop keyboards from 13" to 15". Coupon expires after 700 uses.

Expect this item to take two to three weeks to arrive.