Just noticed a weird one on eBay. Yesterday I was searching for Wade Boggs bats and found one I don't have. At this point that is a fairly rare occurrence. The bat was a little more than I wanted to pay and didn't have an OBO so I bookmarked it hoping the seller would send me an offer.
I just logged into eBay and sure enough the owner of the bat sent me an offer and it was an amount I would pay. So I hit the Review Offer link to buy it. Turns out the seller sent me the offer(12% discount) and then within minutes somehow ended the listing and relisted the bat so the offer was no good now.
So F them I will wait and buy the same model the next time it shows up for sale from someone else. I don't care enough about my collection to buy from low level trash. I guess they could be one of those people that if you don't accept their offer in 5 minutes they can't mentally handle it and have to withdraw their offer.