Newegg offers the Seal Shield Bluetooth Keyboard and Case for Apple iPad
, model no. S75BWGC, for $37.99. Coupon code "SELSLJ4BJA24" cuts it to $22.99
. With free shipping
, that's the lowest total price we could find by a buck. (Most vendors charge over $100.) It's compatible with Mac, Windows, Linux, and all iPad models. Features include a swivel holder and backlit keyboard.