You SHOULD be worried. If someone just offers to buy at your asking price without asking questions about your amp, then tells you that he has no money, I reckon he is after something else. The problem with Audiogon is they allow non-members to make offers so you have nowhere to trace back to the phony buyers or leave negative feedbacks because they are non-members.
As far as I am concerned, if a buyer makes an offer and the seller accepts his offer, then it is a binding contract. I know in reality a lot of buyers opt out of their offers after they find out the bottom line of the sellers. This is something that Audiogon should enforce to allow sellers to leave negative feedbacks on phony buyers or non-serious buyers so that the sellers are aware of them before they start negotiating the deals.
As far as I am concerned, if a buyer makes an offer and the seller accepts his offer, then it is a binding contract. I know in reality a lot of buyers opt out of their offers after they find out the bottom line of the sellers. This is something that Audiogon should enforce to allow sellers to leave negative feedbacks on phony buyers or non-serious buyers so that the sellers are aware of them before they start negotiating the deals.