Well, I was wondering about that too. When I was verifying everything last time we got together on Sunday, I noticed there were quite a few items I already had catalogued. Sometimes I think all 3 of us may have had the same item lying out for pick-up.
I was thinking of posting lists for you to start running through your stuff to see what you need. I know at least what I am still looking for so I could always just post what I need which would be shorter than a full list. It's sort of why I posted the list of fossils and Nintendo items. I was then going to start posting more lists but I got busy with work.
Do you want to do it that way? I'm only buying items I do not have in my catalogue and leaving them out for you because at this point, I have to assume you already have the same items as me. If you just buy everything in your shops everyday, you are going to have a lot of redundant items. Let me know and I'll start listing up this thread.