I just sold my BA2 05 with built motor and full suspension setup for 16,500...
Didn't have quite as many power mods, but it had 110,000ks, leather, sunroof, FPV sideskirts, premium sound, upgraded brakes etc
Maybe the market is good where you are, but in Sydney you are struggling to get over 20 unless the car is really a high end package
Good luck though!