[jturbo3.6]

I got a lead of a "suppose" 77 non intercooled turbo Carrera.
of course, with breath holding, I went to see the car.
it looks all good, until I see the vin is not a 930 vin, I know it's a clone.
it's a actual 9117xxxxx car so, it's right year.
has non-intercooled turbo engine, turbo 4 speed, turbo interior, turbo steal wide body, tail looks like oem too.
is has a/c,
previous owner owed it for 15 years, and I believe he doesn't know it's not a original turbo.
car runs and drives good, looks exactly like 1977 turbo Carrera unless you check the vin. someone spent a lot of time and money to make it like this back in the 90s I believe.
how much do you think this car worth?
I still consider to buy just for fun car to drive around, and not paying 6 figures for real one,
thanks in advance.