Markets like this have been in countless games and at the beginning are an increasingly fun way to make money but by the end of the game they usually have made it entirely too easy to get a hold of great eq for cheap. That being said I'd love to get rid of the useless junk I have laying around in my mage
There's a positive and negative side for this idea... Still think it could be an awesome addition to the game though
Why all the haters trying to find something wrong or bad with this idea? We all have at least once upgraded our equipment for better stats and the previous equips just lay, forgotten and unused. Honestly this is well thought out. Support.
Okay so here is how I would exploit your system. I would farm hte for money and mats...then I would sell the mats for extra money. Then on my alt I would buy my slightly overpriced mats and resell em cheaper so that my alt takes the hit for it financially. But he'd make up for it by also hitting hte to compensate. This would allow me to funnel money to my main without the usual 40% gold loss involved. This would eventually drive down the prices of mats until nobody needed them and they were worthless to the community. Then I'd switch to the next hot item like dragon scrolls or something