I see this problem with BOTH buyers AND sellers on audiogon. Maybe I'm used to different trading systems in other online communties. Too often I see buyers calling "first dibs" but never follow through. But the converse is also true (and one I find more objectionable). Often I'll see a seller promise an item to someone who calls "first dibs" but then sells to another buyer to "sent the money first." IMHO, the shi-at just "ain't right." It is this lack of a "basic level of decency" that disturbs me about A'gon.
Yes sometimes buyers back out. They shouldn't, but sometimes they riffle out a "I call first dibs" before they should commit to an item. I personally try to not commit to an item I know I don't have the funds for, but sometimes I don't quite balance my checkbook correctly, and I don't have the money i thought I did. In that case the seller should move onto the next person who has "dibs."
A little explanation of how I think the "dibs" system should work (in my mind). A sellers advertizes the item with single email address. Prospective buyers in turn email the selling either with questions, calling "dibs," or with "dibs" pending the outcome of some question (pending item's condition, for example). The seller, should (IMO), grant dibs to whatever buyer emailed him "first" (look at email time stamp) and called "dibs." Most honorable sellers will do this at most internet communities (I say "communities", and NOT "classifieds" there is a slight difference). Any subsequent "dibs" emails that are received are stacked in order according to the time stamp.
The seller then should email all the parties involved, first telling the first buyer that he is in line for the item. The buyer and seller should agree on a "time period" for which the dib is considered "good." usually 1-3 days is the norm. I will often state this in my ads. Also at this point the seller should email the send an email to the other parties to let the buyers know "they are not being ignored." how are they to know the difference between no reply from seller, or the item is pending a sale? An email from the seller to all interested parties is in order. The seller emails everyone and lets them know that , for example 3 people have "dibs" ahead of you. if those buyers drop out in X days, the item is yours.
First buyer drops out? Email buyer two (ranked from email timestamps). Let him know the other guy dropped out and offer the product to him. Maybe buyer two bought something else in the mean time (since he knew someone was ahead of him), ok offer it to buyer three, and so forth. Make sure everyone knows what a "reasonable response time" is. Some users think email should be answered in three hours. this is not always reasonable. Sometimes even 1 or more days is needed between replies, depending on that person's situation. not everyone who doesn't answer email every night has "dropped off of the face of the earth." be reasonable. but also be fair. It works both ways.
There needs to be balance. If sellers expect buyer to stick to their word, buyers need to expect that sellers will stick to THEIR word, and not simply sell the item "who ever sends the cash first" or even worse "someone who offers more money." Neither of which I find very fair, but IT IS a free market, so I understand why it happens. So I think both buyers and sellers need to be fair. you can't have one without the other, IMHO.
Think about it. If "calling dibs" on an item is meaningless anymore, why not just call dibs on EVERYTHING? It's not like the sellers are using a dibs system, like IMO, they should. No seller whats to give up the priviledge of selling how he pleases. No wonder the buyers are as flaky as they sometimes are! There's no good reason not to be. It's not so much cause and effect. It's more symbiotic...
//steps down from soapbox...