Geiliable Store via eBay offers the OxGord OBD II Diagnostic Car Scanner, model no. CRST-MS300, for $13.49 with free shipping. That's a slight drop from last week's mention and the lowest total price we've seen. (Outside of other eBay sellers, it's the best deal now by a buck.) It works on 1996 and later OBD II compliant vehicles and features a backlit LCD display.
Note that it ships from mainland China and may take up to three weeks to arrive. Need it sooner? Covershield via eBay still offers it for $13.95 with free shipping. (It ships from California.)