Add ALL the specific skills available. I was searching for instruments, but I can't look for +Instrumnets skill, only +ALl Magic Skills, and many Minstrel items are specifically +Instruments. The in-game market explorer assumes that if I say +Instruments then +All Magic Skills should be included as well. That would be smart to replicate.
Add realm exclusion for the general item search. It seems like the results are filtered right now based on the realm into which I am logged. So, why should the pulldown menu for Alb include Celtic Spear(Hib) / Spear (Mid)?