CowBoom offers the 1st-generation, used Apple iPad 32GB Wi-Fi Tablet, model no. MC496LL/A, for $349.99. With free shipping, that's $160 under the lowest total price we could find for a new, factory-sealed unit. This 0.5"-thick tablet weighs 1.6 lbs. and features an Apple A4 1GHz processor, 9.7" 1024x768 LCD touchscreen display, 802.11a/n wireless, Bluetooth 2.1 + EDR, accelerometer, compass, up to 9 hours of battery life, and more. This used unit may have dents, scratches, or missing parts.

Of note, no warranty information is provided.