I was dropping some things in the guild scroll depot tonight and noticed a hide unusable checkbox had been added. I don't know how long it's been there, I tend to go a while between looking in it, but THANK YOU SO MUCH! That will make sorting through it all so much easier when people are trying to find things they need.
You can click on the missing piece in the collection while viewing the broker and it will show the availability of that one. Hope you have good luck!