What is a good comm lathe for a reasonable price? I'm looking for one that can do stock and mod motors, and a diamond bit would be nice, but I know that that jacks up the price. I've seen lathe's that can do stock and mod motors, but they dont come with a bit, and vice versa. Any suggestions?

look on towerhobbies

I use a Cobra With a carbon bit that works great cost was about 140. a couple years ago, RED

Best bang for the buck I've seen in comm lathes is the Trinity Tru lathe. As for carbide bits, treated right they will last for quite a while. Get a fine whetstone and hone that baby every third comm or so. Carbide does not like to take small bites so use the tool to clean up you comm and get some superfine emory boards to do the final dressing.