VM Innovations offers the Lifesmart 12,000-BTU Portable Air Conditioner, model no. LS-YPF-12C, for $269.99. Coupon code "WEVALUEYOU" cuts it to $256.49. With free shipping, that's savings of $343 and the lowest total price we could find. It cools rooms of up to 500-sq.-ft., three fan speeds, side slide-out filter access, antimicrobial filter, multi-directional vent, and remote control.