The prices reported by NPC's (including the preists etc) are hard-coded into the game.
The "going" prices are whatever players want to charge/pay for an item and are therefore flexible and can fluctuate quite a lot, especially over a long time. This is especially common if there are much higher level items added into the game (as I suspect is the case in this instance) or if there are lots more people able to manufacture this item.
Well I understand what you said, but maybe I should have said that the price the priest is asking is 38K. So now you can see why I asked the question and if you do gillians quest he asks you to bring him the titanium chain from aulwen, thats a hefty chunk of change for a quest, I'm just wondering if I bought one from another player would he know the difference? See why I'm concerned.