Guild Market Exporter automatically scans all of your guild stores, and exports the data to a saved variables file. This file can then be used in other programs outside of ESO.
Why? To help "make trade" of course.
The Merchants Guild (esomerchants.org) has also launched a web based item/pricing database based on exported guild store data using this mod.
You can browse the database by going to esomerchants.org/item-database/
You can contribute by uploading your saved variables file to esomarchants.org/upload/
See the README file for additional details, or fork it on github. github.com/renic/esomerchants