Walmart offers the Masterbuilt Magnum Hitch Haul Wide Cargo Carrier, model no. HP2W, for $88.60 with free shipping. That's the lowest total price we could find by $12, outside of the price below. It measures 6" x 60" x 33", and features a 500-lb. capacity with a 2" receiver bar.
A close price: Parts Train charges $69.80 plus $18.92 for shipping. (Search for "HP2W".)