Tanga offers the Canon Pixma MG3620 Wireless Multifunction Color Inkjet Printer, model no. 0515C002, which also scans and copies, for $19.99 plus 99 cents for shipping. That's $3 under our mention from a month ago, the best now by $24, and the lowest total price we've seen. It prints up to 10 ppm in black and 6 ppm in color with up to 4800x1200 dpi maximum color print resolution.
Note that it doesn't include any ink.