I planning to build an eddy current dyno, but I am having trouble finding any. I can find some on ebay for like 1000-2000$ but all of them at that price look like they have been through hell and put up wet. I can find tons of them on Alibaba new for around 1000$ but I don't know of a good way to tell if they are any good. I really don't want to spend 1000$ plus shipping from china just to realize it's a useless yard ornament. The wiki mentioned that some commercial vehicle junkyards should have them but I cannot find any willing to sell to the public. So I'm kind of stuck. Am I missing something? Are the ones from Alibaba any good? Where would be a good place to look?