Undercutting

[kidvideo]

So how would you fix undercutting? break some legs? force people to comply? Standardize prices? If someone is desperate to get rid of an Item, they'll sell it for less.

Almost like supply and demand work in game...

I'll provide answers for whiners.

So how would you fix undercutting? Free market. Not a problem.
break some legs? Illegal. Racketeering.
force people to comply? See above.
Standardize prices? Price fixing is illegal.

As with any business: adapt or close your shop.