I am also a level 50 GSM, a week ago I noticed that Tourmaline Chokers were up to 3600g each, with only a single HQ item on the market board and a sale history that showed strong demand from a handful of crafters leveling. I made some and went to list them to find that someone also listed some at 2800, undercutting the one item being listed by 800g for no reason at all.

Well actually there is a reason for this, if you consider that when prices are deflationary there is no confidence. So everyone is basically doing a run on the banks and not investing this money back into the economy at all, as the running assumption is that things will be cheaper. Prices of La Noscean Toast and Buttons in a Blanket on Tonberry have actually fallen below the cost to make them.