At Speck at eBay, buy one item and get 50% off a second item of equal or lesser value in-cart. With prices for two items starting at $14.93 after discount, and free shipping on all orders, it's the first such offer we've seen from Speck's eBay storefront, putting many pairs at the lowest total price we could find. Shop smartphone covers, iPad and tablet cases, and iPod accessories.

A best bet is two Speck FitSleeve Cases for iPhone 4/4S for $19.95 each, or $39,90 for two. In-cart, they drop to $29.92. With free shipping, that's $14.96 each and the lowest total price we could find. This case features a vegan leather shell and microfiber interior.