Lucky you, you have an LCS and knowing your area you probably have a ton of them.
Did you ever think about making an offer on one or more of those 5,000 count boxes? I used to get tons of great stuff by doing that when our LCS was in business and got quite a bit of vintage that way.
I like that idea, unfortunately there is so much junk in most of them that I would take a bath on it. Plus if I brought home more projects, it might be a problem!
I am however trying to sort out all the vintage that I find and set it up in specific boxes so I know what I have looked at and what I haven't looked at and also make it easier for the next guy looking for vintage.
How valuable are the tri-cards from 80-81??? Topps basketball - found about 25-30 of them while digging. Obviously not the Magic/Bird one, but Moses, etc. prominently featured?