How do you get your auction data? Can anyone contribute by uploading their own logs?
Also, you mentioned that you used a dump of the eqemu item database to get item stats. I'd strongly encourage you to get these from the P99 wiki instead, as many items have changed from their classic state to what is presently on live and eqemu. A couple examples off the top of my head:
http://wiki.project1999.com/Sabertooth_Amulet versus
http://everquest.allakhazam.com/db/item.html?item=1226
http://wiki.project1999.com/Helm_of_Rile versus
http://everquest.allakhazam.com/db/item.html?item=1456