Newegg offers the refurbished DeLonghi 12,500-BTU 110-volt Portable Air Conditioner in Black for $259.99 with free shipping. That's the lowest price we could find by $10. It features three fan speeds, dehumidify and fan functions, 24-hours digital timer and thermostat, handles, casters, remote control with LCD display, and easy-access washable filter.

Note: A 90-day warranty applies, but it is unclear who backs it.