Amazon offers the Master Lock Bike Carrier, model no. 2896AT, for
$52.98 with free shipping. That's $1 under our March mention and the lowest total price we could find now by $102. It's designed to hold up to four bikes and fit a standard 2" x 2" receiver.
Update: The price has slipped to $52.74.
Master Lock Hitch Mounted Bike Rack - 2896AT is also available at these stores
Brand: Master Lock