Fix merchant price scamming

Recently there has been an increase in scam attempts on the FM involving selling of Power Elixir. The seller try to price 1PE to those of 100PE stacks, and mix them randomly in the merchant. Buyers often just quickly click down the list and end up buying PE at 100x the "normal" price, assuming that it is a stack of 100. It is true that we as a buyer/seller should take extra note when trading and accept the loss when we are careless. But what we are seeing here are active attempts, trying to scam people into buying over priced items.

Also after talking to some players, the GMs are not able to concrete action to stop such merchants being put up despite numerous @gm reports. I think we need to improve the TOS to give the GMs a tool to thoroughly stamp out out such obvious and blatant ill-intented behaviour from the game. I suggest to improve the TOS clause 3.2.1 to include this loophole. In addition, we might want to have a lower major abuse threshold for this offence, since such merchant are normally setup on a mule account thus account ban would serve no punishment at all.

Other than a TOS change (because bleh, ban hammer). I also suggest a possible client edit by making "1 for X" item display a different colour from "n for X". Both of them are the same colour now. This also can help the players to safeguard against such scams

Edit:
Some suggested to just remove the option to sell a bundle of items. I think this is a pretty good and simple idea, added here for visibility. Maybe just hardcode the quality input in the client to 1 or something.

Below are some screenshots that I got from discord today wrt to such merchant behaviour.