Hmm, not sure what to think. When I place a bid on ebay, I know I'm stating I will buy at that price. BUT I'm not expecting that offer to stand indefinitely. After the auction is over, I'm expecting my offer to be null, even if the auction is a no-sale (reserve not met).
Make an offer? To me, that does sound like I'm I'm haggling. I can make an offer, if the other person says "ok"... I could still walk. There's a moment IN PERSON where I can mull it over. Should online be different than in person haggling?
Interesting development though. As long as I know the timeout for an offer, I could see myself ok with this. Like, my offer is good for a week. If accepted, I'm obligated to buy it--but that has to be stated clearly up front. If that is what "make offer is", then I don't mind it--as a fully informed bidder.