Edit: Computers.woot! has it is now for $4.99 after code LOGITECHFIVE [Exp 11/3].

Amazon has the Logitech C270 HD Webcam (Black) for $17 with free shipping on $35+ or with Prime. If you're willing to risk it, AmzBuys with Walmart (4/5 reviews, 387 reviews total) sells it for $12.

Has a 720p, widescreen HD video calling, light correction, and noise-reducing mic.