i had no idea my post would generate such strong emotions! in fact, i have a very strong position on "what's your best offer" buyers -- i was just looking to see what others thought. i am decidedly in the camp that any buyer whose first question is "what's your best price" is not worth responding to. to me, this kind of an opening communication suggests a very strong likelihood that the buyer is not serious, or is simply interested in "window shopping." In fact, I find this approach rude. When I list an item "OBO" it quite plainly is AN INVITATION TO MAKE AN OFFER -- either at my asking price, or AT THE BUYER'S BEST OFFER. It is NOT an invitiation to ask me to negotiate against myself. True, listing something "OBO" indicates that the seller is willing to negotiate -- but not against himself!