[dentist90]

A question for the brain trust here.

My wife has been selling stuff on a local Facebook page called "Beg, Borrow or Barter". It is basically an electronic garage sale. The stuff she places ads for sell within seconds of posting.
On her first sale the buyer posted "I'll take it" for an inflatable gym for $75. The second and third responses came within a minute. She replied to those two that the item had probably sold and contacted the first ("I'll take it") buyer. Well, I'll take it became "what condition is it in?", "how big is it?", "can I look at it next week?" and finally "will you take $50 for it?". My wife calmly said that the price was firm -as posted in the listing- and there were two more buyers for it if she wasn't sure. So the lady says sure, I'll take it. Can you deliver it? An hour away! My wife happens to travel to this town every week so she will do this out of the goodness of her heart, but a lot of extra work for her.

So today she sells our trampoline and has several responses in 10 seconds. (do these people have their hands hovering over their keyboards like a game show?) The first buyer posts that she "is interested, but wants to talk to her sister first". Can probably come to look at it in two or three days. The second offer is to come look at it tomorrow. She gets a pm from the third saying she will come right over with cash in hand. So my wife calls the third back and we have the money inside the hour. She posts on the site that the trampoline has sold and thanks all for the interest.
Then the b*tching starts. How come you didn't sell it to the first person? That's not fair! She had it first! So my wife just deleted the for sale post to make all the negative comments disappear.
Needless to say she is a bit frustrated and confused. What is the proper protocol for something like this? There are no rules posted on the B,B &B page. If the first response is a 'maybe, I'll let you know as soon as I can' and a subsequent one is 'here's the money and I have my pickup in your driveway', do you send the $$ away for the maybe sale?
Some of the people on that site are nasty, like we owed them something. What would you do?