I quite loved the auctioneer mod myself, however in eq2 it is just not possible to redo (speaking as a mod designer). I disagree with the luckily part tho, I would truely love to be able to redo some of the WoW addons for eq2.. auctioneer, myroleplay, raid mobs, attack alert... the list goes on and on
a) We cannot access the information that is in the searches to record it anywhere.
b) We do not have hard drive read/write to be saving the information found
c) we cannot add new things to the tooltips, so no adding what the average price was to the objects tip.