seller etiquette

@hilde45 +1-absolutely right. For the sake of discussion, accepting the facts stated by the OP, the seller made a deal. He could have said, "no, first one here with money wins." Nothing wrong with that, but he didn't. Its really as simple as whether the seller honors his word-what we learned in kindergarten. Its too trivial to even consider anything "legal" but as to the question of whether seller is wrong-that seems obvious. Its really no different than if the OP arrived with the cash and seller said the price went up a hundred bucks. You either keep your word, or not. These days, its often "not."

I can't speak for the Gon, as l have no experience of it as route to making a purchase.

I have formed an understanding through other forum usage, that there are certain members who are active members because they like the idea of exposure, as they do intend on finding a customer at some point.

On the Gon, I see another influence surface within a thread, where members are participant as there is intent on selling and steering threads towards the idea of making a purchase seem to be the solution to a query.

I would bet with both types of individual, when it comes to the idea of a sale being made, there is a hardness about what a sale should look like. A simple inquiry can become a commitment in the mind of somebody wanting to shift something fast.

In this case it seems delay is classed as risk, and anything that suggested the Vendor may end up with their item without a interested customer was not to be supported.

Kick the sand of ones shoes and move on to where one feels the better welcome, I'm sure when paying a different natured Vendor for an equivalent item, there will be a satisfaction found.  

OP

get over it.  You hadn’t put any money down.  Sellers live in a world where they frequently get disappointed by buyers who don’t follow up on promises to purchase.  The seller actually reached out to you to give you a chance.

  You stated that you lost faith in humanity over this .  Really?  With all the horrible things happening in the world today you lost faith over the purchase  gone awry of a used piece of audio equipment ?  You must lead a very charmed life

 You stated that you lost faith in humanity over this .

Nope. I have never said such a thing.