I just bought a 2013 XTerra a few weeks ago and gave up on finding a used hitch. The few I found did not include hardware and shipping costs were prohibitive.
I found a brand new Curt hitch at www.AutoAnything.com for $134.99 including shipping. They also included a hitch pin and clip. Shipping was via FedEx and was really fast. http://www.autoanything.com/towing/73A3874A0A0.aspx