This could go either way.
I've seen this scam in violin auctions...shill bidding by players who have also contributed positive feedback. Sometime the feedback given by friends and family members.
But 3,000 positive reviews? That's a lot of work just to unload one set of rims. This one could be legit as others have said.
It's these dilemmas that made me quit shopping e-bay a couple of years ago. I just don't know who to trust.
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Good night...and good luck