Normally $98.99, seems like a good price at $48.12 + tax with free shipping, and cheaper than Harbor Freight's 500 lb cargo carrier of a different design and a smaller platform.
Also currently the exact same price with free shipping at Home Depot.
Highland Steel Hitch Mounted Cargo Tray, Black
60" x 20"
500 lb capacity
Fits 2" receivers
2 piece construction bolts together in minutes