I absolutely detest undercutting in this game. It's one thing when people undercut by a few gil, or even lower the price some 5-10%, but I've seen so many people undercutting immediately by 50-75% and dropping the price on items making them no longer worthwhile to even craft. It's one of the banes to the games economy for crafters. It really starts to pigeon hole crafters into making HQ 2 stars or to just GTFO if you don't like grinding for hours on end to make just a few hundred gil an item assuming you gathered every mat yourself.

Really the markets should be scrapped and the auction system from XI needs to be put in it's place. You have far more stable markets where you don't see the prices on an item drop by 50% or more in a single undercut, and considering resources and crafters are far more plentiful in this game than XI, you shouldn't see the issue of prices being so obscene because there is going to be a lot more items available.