It seems high but fair. the XTR looks in in good nick, its got a Chris King rasta & M900 cassette, a nice wheelset and the frame would probably get offered at around £800-900 by itself.
so the listed price is probably the sum of its parts. would I pay £1400 for it? No, but then i'd struggle to do that for any retrobike (its much easier to buy the parts separately and never add up the total)
Just added link above to a frame only sale I made for a similar Yo Eddy , way back in 2017… I sold frame only for £477 ( & delivered it by hand). Only sold as not correct size for me, and was seeking a ‘rider‘ frame - the Chameleon Green is a amazing paintwork colour scheme, and the Yo Eddy‘s are lots of fun to ride or just build / appreciate details depending on your tastes!
Not sure about current value , I do know sometimes prices go a bit crazy, I’d see if you can strike a deal - or even see if you can just get frame & matching painted Judy fork … it is ebay afterall !
Hope the above is helpful.
Just looked at the images closely , make sure you get those Cook Bros. green QRs too !