Anyway... back to the thread
I hate trying to buy in a "tender" or "sealed bids" scenario. Give me an auction any day where at least you can see what you are bidding against, even if it used to be a tree. Tenders could see you pay considerably over the next lowest purchaser's price, which is great for the vendor, but terrible if you know you paid a lot more than you needed to had it gone to auction.
In your case, whilst the agent called for "best offers" and said there would be no further negotiating, had I any more to give in order to buy a house I really, really wanted, I would have played the agent's game and increased my price.
It might not sit well from a moral viewpoint, but having missed out on a house or two I'd hate to know I missed by "just that much". Who knows, perhaps the agent might have come back several times, in effect creating a Clayton's Auction (the auction you have when you are not having an auction).
I know years back we signed a contract for $56K when the asking price was $55K. I saw the house at 5pm (with three other parties), there were four contracts going in at 6pm I got agent to fax contract to hubby, called him and said "please sign the contract coming through". His response "what am I buying?".
There were four other contracts going in and we went in cash unconditional, so the vendor chose our contract to sign. One other purchaser put in a full price offer (we went $1K over asking price) and tried until 9pm that night to bully the agent into ripping up our contract, got a lawyer involved to see what could be done. Luckily the agent stuck to his guns and upheld our contract.
It was a slightly different scenario to the one in this thread, because the vendor had actually signed our contract. We didn't know that until the whole story unfolded, well after 9pm that night. Had the agent been less honest or more easily bullied, he and the vendor could have ripped up our contract and we would never have known. Both vendor and agent were honest though, and we got it.
When my parents sold their house, it passed in at auction and the following Saturday the agent had a contract. Same day another buyer wanted to go to paper, and she told them she had another contract. Both offers were exactly the same amount, but one signed a contract. She tried to get the other party to put pen to paper, and they were told there was another offer ready to be presented. They didn't believe her, and thought she was trying to get them up higher. But she was not playing games with them, and that night the house was sold.