PC Micro Store cuts an extra 50% off a selection of rooCASE Cases and Screen Protectors for iPhone 5C via coupon code "IPH5C50APR". Plus, most orders qualify for free shipping. Coupon expires after 500 uses.

A best bet is the rooCASE Hype Hybrid Dual Layer Case Cover for iPhone 5C in six colors (Blue pictured) for $15.95 before the above coupon, $7.97 after. With free shipping, that's the lowest total price we could find by $12.