Refurbking via eBay offers the refurbished LG 5,000 BTU Window Air Conditioner, model no. LW5015E, for $89.99 with free shipping. That's the lowest total price we could find for a refurb by $22. It includes an installation kit and features 2-way air direction and two fan speeds.
A 90-day warranty applies, but it is unclear who backs it.