well there is like, formula ford and stuff like that....i'm pretty sure it is more expensive though.

a friend of my uncle's races a D-sports racer which is basically a mini le-mans-style chassis and body with a motorcycle engine in it. he has about $20,000 in it i think. its a seriously fast car though, IMHO. thats what i plan on getting when i have the funds.

edit: actually i have an article about it from sportscar magazine. im scanning it in right now just in case any of you guys are interested in it.