Seeing that it still has the stock pipe and muffler, I assume it doesn’t have the “Stage 1 Performance Kit” (what RE use to refer to as the Power Commander 5, free flow pipe and muffler, K&N filter) installed. In my opinion, having the Stage 1 Performance Kit installed, which would allow someone a much easier option to tune the bike on a dino. Having the kit installed I would think would add some value and make the bike a little more desirable to a buyer.
Having 3,700 miles on it, and if its super clean with no scratches or hazing of the paint, especially on the top of the tank. Here in the us, a ‘14 GT cost $6,000 at the dealer. I would have no problem, as is, asking $5,000. That allows you plenty of room to take a good offer from someone.
My ‘14 GT has the English made Stainless Steel free flow pipe and muffler from Hitchcock's, as well as the Stage 1 Performance Kit (Power Commander 5, free flow pipe and muffler, K&N filter). It also has the optional 7 inch head light and bar end mirrors. It has right at 12,000 miles. The bike is just as clean as the day I bought it new from the dealer, never been in the rain, detailed before and after each ride, still with the stock Sport Demond tires (which I have worked flawless for me). Oil change done regularly between 1,500 - 2,000 miles. It has the Duracell battery (lighter and more amperage compared to the stock battery).
I would have absolute no problem asking between $6,000 - $7,000 for it.