That's because you're an idiot.

I'd say autotrader [seems to be the first port of call for people nowadays] or even the good ole exchange + mart for that sort of car

Whack it on all the free sites too like Loot, Free ads, Adtrader etc. it's worth doing if its free

Also worth a shot on bmwgb forum, I must admit I don't bother with forums cos you tend to get people replying that either know more about the car than you do, want to pick holes in it because "ooh it looks like its got the 614268 oojamaflip on it, not indigenous to that model" or just fucking idiot dreamers that think you care what they say