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.