2014 Surly Pugsley

I'm selling my 2014 Surly Pugsley fat bike. I have the original receipt which shows not only the original purchase price, but that it's a Medium. In measuring the frame, I calculate it to be a 19" or Large. It's set up as a 2x9 using Sram X5 crankset, Shimano Deore shifters and Shimano Alivio deraillers. It has a Salsa handlebar and a Felt headset, along with Felt grips. It has Tektro Novela mechanical disc brakes with a 160/180 rotor combination. It is set up tubeless, but I also have the stock tubes. This bike generates an enormous amount of torque when in its low gears as I quite often lift the front tire several inches off the ground without trying. Price of $900 is firm and I'm not interested in trades of any kind. Will consider shipping in the US at buyer's expense.