ITrimming via eBay offers this Marware MicroShell Snap-On Case for iPhone 4 and 4S in Red, model no. 62956789, for $4.46 with free shipping. That's $1 under our March mention and, outside of the price below, the lowest total price we could find for this case in any color by $18. This ultra-thin polycarbonate shell snaps on to your iPhone to protect the back and sides from bumps and scratches. Deal ends May 3.

A close price: EverydaySource sells it for $1.99 after coupon code "S0414AYJJ" plus $2.99 for shipping.