I dont' know. I don't believe I've ever seen a *good* condition TT go for that price. It'd definitely be a good idea to get a compression test, try to get under the car, check out the suspension for leaks .. etc. Just make sure to go over it with a fine tooth comb. Check the VIN on carfax to make sure it hasn't been involved in any wrecks and to check how many previous owners it has had. If it has traded hands numerous times, then it may be a car you want to pass up.
Cliff Notes: Make sure to get everything checked out before you committ.