Regardless of what you have into it, or what mods you have made to it, our Zs are, essentially play toys. I love them dearly but almost nobody here uses their TT as a DD. This will be especially true when gas reaches $4-5 per gallon (like the middle of this summer). Look at the classified and Ebay. Nicely modified TTs are not getting 12k. I doubt that you could actually get someone to lay down over 10k on your car. Sad but true.