looking for a nitro motor.

[dirt101]

I just got a CRT in a trade with a dynamite platinum .21. The motor is to say the least CRAP. It has more air leaks then a trx3.3 factory. It also came with one of the fins totaly ripped off(oddly its not the top one). It's a 9 port so it has no bottom end so its just not worth it to me. The thing has just been a pain and im looking for another motor to buy off someone. I dont have enough dough to go brushless right now, so let me know what you guys have as far as nitro motors(used).

I would prefer they be bump start but I will look at anything big block.