New, unless it is real expensive (I would hope not). Then I would prefer to have a used one, since it is only for Jim Conforti to take apart. Can you get a new Euro one? That alone will give me 400 more rpm's. I would buy that and give Jim the one in my car now (the prefered option). If I can only get the US version then I will wait to see if Jim really does need it, I am thinking he will.