This looks good. What I would also find useful would be some method of searching ahead in range. At the moment if you want to keep at eye on the market for pieces of armour for your next level you only have the option of setting upper limit RED. This returns armour at levels all the way up to 50. If you could specify search by range, e.g. 32-34, you could see much more easily those bargain pieces you might like to buy now for use later.
I'd also thought it might be better to be able to search by armour level, i.e. light, medium etc. But being able to specify class as well as colour this change should have almost as good an effect.