Glad to see we have varying opinions, exactly what I was looking for when starting this thread.
I guess like anything, it's what matters to the potential buyer and their use for the car.
You might want a project to learn from and a fun car to own and use. This can be achieved with a either a cheaper shell or one that commands more of a premium.
I reckon it will become more important in the years ahead when people start collecting these cars, at that point I'm certain, the vin plate and history will come into play more.
£1200 would get you a decent shell a couple of years back, but a TT6 shell seems to be quite tough to obtain these days.
UK specs I'm thinking will command a premium due to number produced etc.