Check Ebay & bike trader for comparisons.
A local Triumph dealer offered me so little for my 2016 XRT (that I'd been paying them thru' the nose to service so it really grated!) that I kept it as a winter hack.
When I do decide to sell it I'll accept anything over their derisory offer.
Anyone want a 2016 XRT, 40k+ miles, full service history, apparently only worth £3.5k !!