3 series buying questions

[D-J]

hey, i am intrested in purchasing a 3 series for autocrossing and some track use. I was wondering what years and models are good and which ones i should stay away from. thanks alot

[winfred]

e21? e30? e36? e46? without knowing what body you like the best advise i can offer is research the avalable racing classes in your area and see what is competive, depending on the clubs in the area there could be many to pick from