I don't understand how people do this on a regular basis, I'd feel dirty doing it. Yeah you get a sale but how can you look at yourself in the mirror? Unfortunately it happens and life goes on. I've been around the hobby for a decade and seen it from store to store, wholesaler to wholesaler, it just gets a little weird at the hobbyist level.
I mean if there is someone posting in a wanted section and multiple people PM with a better price than the one who posted on the thread, I see no problem with that. If however seller A has a thread in which there is a clearly listed price and clear interest and then "seller B" PMs a prospective buyer from A's thread with a better price its unethical... But what about if the prospective buyer knows that B has the item and PMs them after already making a deal with A? What if they back out of the purchase from A because of the PM?
Personally, I know it will never stop, and it sucks, and its something we all have to get used to. I managed a store on another forum and knew people would PM other members that I'd been in talks with over pieces, unfortunately there was nothing I could do about it. The alternative is that maybe the Mods can monitor every PM or message, but I'll take a lost sale to Big Brother watching it :tongue:.
These people will slowly be weeded out and it will become common knowledge among the buyers and sellers who they are and their business will slowly drop so I'm not super concerned, it sucks though