I can only assume people have been busy selling to get gold for housing, or people are not buying and are saving money instead. It doesn't affect me too much as I only sell crafting items that I get in my regular activities, so any gold I make is clear profit.

While I am trying to make gold, with a tidy sum in the bank already, if I am not happy selling stuff for the going rate, I will simply hang on to it and maybe sell it later if the prices rise. Be interesting to see if purple/gold improvement item prices rise with some master writs needing them in the housing update.