For Prime members, G.I.N Deals via Amazon offers the Griffin Elan Form Graphite Case for iPhone 4 in Black, model no. GB01694, for $4.08 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs about $8.) That's $3 under yesterday's mention and the lowest total price we've seen. It features a polycarbonate shell and allows for docking without removing the 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.