Exactly, two different cars, 3i is way harder to find also. Just because it doesn't have a turbo doesn't make it inferior just a different drive with no lag.

Old fords are widely regarded as excellent investments in this condition regardless of model. Personally I think it's worth al least 10k and to some collectors, is the same as the change in my ash tray.
I bet it would pull a crowd at the shows.

Saying that's cosworth money is only relevant if you want one, it will be a very economical to run and maintain as a classic also unlike cosworths.