You may a little gold mine there. Careful at what many would assume to be junk, sometimes the smallest most odd thing can be a treasure chest.
I liquidated an old office supply store once and it was in business back when pens had ink wells and closed up some times in the mid to late 80's so not sure how old some of the inventory was, but I had mechanical pencils with .78 cent price tags on them that I listed at .99 cents each as I had many of them so I easily had a few hundred dollars in pencils alone. Next thing I knew my .99 cent auction blew up and the bids went to 89.00 , I send a second chance off to the next guy in line for 88.00 and he takes it .
Needless to say I found a small treasure and it was something I never would have thought was going to be a treasure. Some of the best collectibles today are things that never were meant to be collected, those often got used and tossed away and never thought of to collect so it adds value.