What's it worth
 

I have a guy that has a 2002 TT with X-50 package. triple black with Alcantara head liner. The car has 52k miles. He is looking to trade me this with some cash for a boat. I would like to know what a fair market value is on this car. I am not looking to steal the car just simply a fair trade for both parties involved. I am a little concerned with the miles but the pics he sent the car looks to be in good condition.

Thanks