E-bay is worthless

I had a really scary incident happen about 2-3 weeks ago. I had bought a supercharger from a fellow in Michigan (I think) about 2 months ago. Well, 2-3 weeks ago the identical ad pops back up on eBay under a new sellers name (1st time on eBay). The guy I bought from phones me ands asks WTF, and I tell him the blower is sitting in my garage and it's not going anywhere. So we both sent multiple emails to eBay telling them that the sale is a fraud - and eBay didn't do a damn thing - nothing!!!!!! Some poor fool sent his money off into electronic oblivion never to be seen again. My lesson learned - I do not buy from anybody unless thay have a visible track record - nobody.
Daryl