Always.Deals via eBay offers the Canon Pixma MG2520 Multifunction Color Inkjet Printer, model no. 8330B002, which also scans and copies, for $18.99 with free shipping. That's the lowest total price we could find by $8, although we saw it for $2 less two weeks ago. It prints up to 8 ppm in black and 4 ppm in color with up to 4800x600 dpi maximum color print resolution.
Note that it doesn't come with ink.