Newegg offers the refurbished Haier 8,000 BTU Portable Air Conditioner, model no. HPY08XCM-LW, for $174.99 with free shipping. That's $5 less than our April mention, the lowest total price we could find for a refurb now by $25, and $88 less than you'd pay for a new one. It features a 24-hour on/off timer and auto evaporation system.
A 30-day warranty applies, but it's unclear who backs it.