I found a cool item over at Cedar Cliff Collectibles a while ago. I had never seen one before.
It's a Topps Sports Card Locker. It was a mail-away item from Topps in the late 1970's and 1980. Mail in details were printed on wax pack wrappers. It was $5.25 plus 75 cents for handling.
This one came stocked with about 700 cards, mostly from 1980, but a few from 1979. I'm going to leave the cards in it, which were carefully collated by team by the previous owner. I'm also going to buy a few empty wax wrappers from 1980 to display with it.