Since it is eBay we all have stories. Here is a recent one I have. I ws looking for Wade Boggs bats. Seller had a pro stock model listed as a game issued bat. I messaged the seller saying it was a pros tock bat because Wade Boggs had never used that model. I also gave them the max price I would pay for that type of bat.
To my surprise the seller changed the description. They also changed the opening bid to what I said was my max. So I put in a bid and was out bid almost instantly. Item never got another bid. Then 2 days later was relisted. I looked at the bid history and it was set to private.
So a honest seller changed the listing and them shill bid me.
I let them relist it a few times before making a seriously low ball offer they accepted.
For a shameless plug I have a altered card honestly listed in the BST section.