I would think best offer in this case would be asking or below. Otherwise you just list it as best offer. This happens all the time and is why I don't hunt games anymore. If I am first caller, I respectfully ask for last shot at it.

It's been quite some time since I was really active chasing pins. I loved the hunt for deals. I have had several of those too good to be true situations. Two notable ones were a Scared Stiff for $1000 and CFTBL for $1500. I was first call on both and of course agreed to his asking price. Then I got the message that they were getting better offers. I replied that I had agreed to your price so all I will ask is that since I was first caller and agreed to your price that you at least give me last shot. The guy with the CFTBL was really hurting for money and he called me back after a couple days and said the best offer he had gotten was $1800 and that if I wanted it for that price I could have it. Of course I took it and he was greatly relieved since he knew he was sort of screwing me. Same for the Scared Stiff...best offer he got was $1500...so I gave him $1600.

So...LeddyB...do the right thing and respect the first caller and at least give him a fair shot.