I'd like to introduce myself before I come to the main part of my work at Coremod 
I'm Nomi, and one of the female rare coders in JKA. Together with Didz im doing all the nice funky stuff for you guys and we hope that you will suggest your ideas at our forum.
What's this Economy System you may ask? Well, I hope you know that Coremod is designed to be a MMORPG/SMORPG. This mod also included nice features which can be found in other roleplaying games like Knights of the Old Republic and one of this thing is a working Economy System.
On Coremod the player should have the opportunity to expand their equiptment with CoreTems. Those CoreTems are special items which work only with the CoreMod Inventory System, but of course you can buy also other things
We are also thinking about adding new features to this Economy System. This could be renting, taxes, stocks, services and alot more
Feel free to post your wishes
Nomi - Coder