Even when the prices do stabilize an stop fluctuating there still going to be a demand for matz, gear, pets, potions, etc. It a full loot PVP game an items permanently break sooner or later. You make it sound like the player market still stop moving and demand will cease to exist. Demand will always exist it just prices for items will be set an be determined, and people won't try an be dumb by spending 100g on a horse out of desperation of being the first mounted archer to have a horse.