Well very simple ,i think to fix the economy of the game (cause its terrible and price Still go up and some people cant really buy or dont have enough time to play cant buy some stuff) we need an NPC like gw1 a Material vendor whit a specific price on the material so it will be more assesible to buy it or gather and price will adjust well in the TP this will help alot in the economy and game.
ps :
Raising orice on the demand item like gw1 its wayy optional but not really nessesary
still please take it as consideration.
(sorry for mi bad english)