Rush Hour Wholesaler via eBay offers the open-box Microsoft Xbox 360 Wireless Game Controller in Black, model no. NSF-00001, for $20.99 with free shipping. That's tied with last week's mention, $14 under a new unit today, and the lowest total price we've seen outside of a refurb. This 2.4GHz wireless controller features a 30-foot range, 40 hours of life with two AA batteries (included), and 2.5mm headset jack.
Note that this item ships in bulk packaging.