HandHeldItems takes an extra 20% off iPhone 4 and 4S cases via coupon code "20IPHONECS". Even better, all cases come bundled with a $1 HandHeldItems Credit. With prices starting at $1.59 after coupon, that's tied with our mention from three weeks ago as the one of the best discounts we've seen on these items from HandHeldItems in recent months. Shipping starts at $2.85, although many items receive free shipping. Coupon expires September 30.

A best bet is this Graphic Case for Apple iPhone 4 / 4S in a variety of styles (Tribal Snake pictured) bundled with a $1 HandHeldItems credit for $3.90 before the above coupon, $3.12 after. With free shipping, that's $16 off and a very low price for an iPhone 4 / 4S graphic case.