

Thank you! I would say something to avoid is staplers that use proprietary staples. The Ace Scout. Markwell staplers. The Duo-Fast pocket stapler. You’re going to want something usable. I have one by the Boston Wire Stitching Comany (later Bostitch) from the 1920’s that can still use standard staples, so for the most part you’re not going to have a problem.
Something to look for is probably that the pusher slides easily, and that thr tension spring still has good tension. And that the blade isn’t bent out away from the staple support, or it’s going to jam. Have fun hunting!

I found that one already! The Swingline 747 is a classic.