I think a lot of people make offers trying to understand what someone would be willing to sell it for only. I don't think they're offers as much as they're questions; "Would you be willing to sell this to me for $xxx??" Then they go and compare to other units they're considering. I had this happen to me too. Now I ask up front. Are you planning on buying this or just using my info to comparision shop. If so, how likely are you to buy my item. Based on their answer, I tell them what MY committment is (i.e., first come first serve or, yes, I'll hold it.)
Doug Henning disappearing act
I've been receiving quite a few offers on gear I'm selling, only to have the would-be buyers disappear when I agree to their terms, and within 5 minutes of receiving their offers! Based upon my discussions with other sellers, this is not uncommon. Please consider whether or not you are willing to commit to the purchase PRIOR to making an offer. The integrity of this community depends upon it. Thank you.