Amazon has the popular Allen Sports 5-Bicycle Hitch Mounted Bike Rack (Premier S-555 or Deluxe Locking 552QR) for $115 with free shipping. Walmart also has it (Deluxe Locking 552QR) for the same price.

Hitch insert fits 2" receiver hitches. Features folding carry arms, quick lift-gate access and dual compound Spine Shield.