this is just a guess, but is it an audi TT and did he think as it was 1.8t it is a 'TwinTurbo', its shocking how little some people know about their own cars! it may even be his partners :S , maybe he is just trying to get interest in the car for selling it, but agree it is over priced, maybe it is a ball park figure for him,
what does TT stand for anyway ? never having owned one,,