HandheldItems takes an extra 20% off iPhone 4 / 4S Cases via coupon code "20iphonecs". With prices starting at $1.59 after coupon, it's the best discount we've seen on these items from HandHeldItems in recent months. Shipping starts at $2.85. Deal ends March 15.

A best bet is the HHI iPhone 4 and 4S Combo 3-in-1 Shell Protective Holster Case Set (pictured) with a $1 Credit for $7.45 before coupon, $5.95 after. With free shipping, and assuming you'll use the credit, it's the lowest total price we could find by $6. It features a belt holster, case, and kick stand.