This has been proposed before and I agree it's a good idea. It requires some
work on my part however as the data is currently not in web-accessible form.
This means the server must be recoded for SQL from scratch, something that I
frankly don't have time to do at present.
In case I can find a nice codeslave to do it, or if I find myself with spare
time on my hands that I want to put on this (instead of my area, furys heart
for example) I'll implement it, along with various other things like:
Field for item owners.
Separated search for the different fields (easy with SQL).
Some other things I cannot remember right now, but I've got them in my notes.

I hope you can survive with the broker as it is for now.