As one of its daily deals, CowBoom offers the used Barnes & Noble NOOK HD 7" 8GB WiFi Android Tablet in Smoke, model no. BNTV400, for $49.99 plus $5 for shipping. That's $10 under our mention of a used unit from a month ago and the lowest total price we've seen for any NOOK HD tablet. (It's a current low for a new one by $45.) It features a 7" 1440x900 LCD, dual-core 1.3GHz processor, 8GB internal memory, 802.11n wireless, and microSD card slot. Deal ends today.

Note: No warranty information is provided. This used unit may have dents or scratches and be missing parts or accessories.