[AaronM]

We'd need to see and drive the car to really judge. I've seen some really rough examples go for $4K or less, I've seen some cream puffs go for $5K or less too.

If the car is really in great shape and gets a clean bill of health from a mechanic he could get $10K or more. Depends on what the modifications are. If the upgraded turbo is a 951S unit, and if the suspension is from a 951S, then it'll be more money. If the car is indifferently modified, it will be worth a lot less.

The red interior is a negative flag because that was never a factory offering. Without seeing pictures of it, we can't tell how well all the necessary custom work was done.

So, the car is worth somewhere between $3K and $10K.