At Kay's Technology via Amazon, get 30% off any KaysCase Cover for iPhone 5 via code "ZHGHOFHV". Plus, Prime members can get free shipping. (Non-members can get free shipping with orders of $25 or more; otherwise, shipping starts at $5.03.) With items starting at 76 cents, many cases are at the lowest total price we could find.

A best bet is the KaysCase S-Line TPU Case Cover for iPhone 5 in Blue (pictured) for $1.09 before the above coupon, 76 cents after. With free shipping via Prime, that's $12 off and the lowest total price we could find for a KaysCase S-Line case.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.