This US classic car insurer has a valuation tool on their web sit that is pretty good. You need not be a member to use it. It appears to me the TR7 is valued a bit higher than should be but the trend lines are interesting.
https://www.hagerty.com/
[img][IMG]http://i615.photobucket.com/albums/tt234/nickmi/TR7%201975/Yellow.jpg[/img]
nick
'79 TR7 DHC
'76 TR7 FHC