MiniSuit via Amazon offers Prime members this Bluetooth Keyboard Case for Apple iPhone 4 / 4S in Black, model no. IPH-4-CAS-KYB2, for $9.95 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.57.) That's $2 under last week's mention of a similar case and the lowest total price we could find by $7, outside of the price below. It features a rechargeable Li-Ion battery, sliding design, and microUSB charging cable.

A close price: All4Cellular offers this similar case in Black or White for $11.95 with free shipping. Deal ends today.