Barnes & Noble NOOK Simple Touch Wi-Fi 6" E-book Reader for $33.00 plus tax and shipping.
NOOK features a 6" E-Ink display with 800 x 600 resolution, which reads like real paper, 2GB internal memory for up to 1,500 book storage, wireless 802.11b/g/n, web browsing, and more.
Most used Nook Simple Touch eReaders online have retailed for $50+.
ETA: If the page shows the product as sold out, try checking again later. Supply increases and decreases throughout the day.