VMInnovations offers the Cool Living 10,000-BTU Home Window Mount Air Conditioner for $281.99. Coupon code "43QRS" cuts that to $209.99. (The coupon may apply automatically.) With free shipping, that's the lowest price we could find by $40. It's designed for rooms up to 450 square feet and features six different modes, three fan speeds, and a multi-directional vent.

Also available is the Cool Living 12,000-BTU Home Window Mount Air Conditioner for $323.99. Coupon code "94WSPS67" cuts that to $249.99. With free shipping, that's the lowest price we could find by $40. It's designed for rooms up to 550 square feet.