LOL at gettin an AMG or an M3 with 10k !!!
1st. Insurance will kill your bankroll
2nd. You need ATLEAST 4-5k left in your pockets to pay for the expensive maintenance
3rd. You'll get an old ass model for 10 gees
If you really want a fun car with 10k i'd get a volks or a s2000 AP1 with around 100k-140k milles on it. But seriously dont expect a bad ass car with 10 grands