At a certain point someone is going to make a loss by matching the deep undercutting. A lot depends on the demand. Of course a deep undercutter can be an idiot who has no clue of the market, but I just wanted to point out that deep undercutting can be a very viable startegy, to either get rid of competition or to sell in volume.

As in my glyph example, I get mails everytime to up my price from the competition as there is more money to be made for everyone. Thing is there is a limited demand. So every type of competition is bad as for my business. For other glyph types I've (unasked) whitelisted a mass seller so I match his price.

About truegold, I stay far away from that market, unless I have some orbs less where I need truegold for. There is an oversupply on my realm ever since new year. Volatiles are way more liquid and less of an investment.