I have enjoyed reading about collecting tins and seeing the pictures. The closest I've ever come to your hobby is keeping a tin of Sucrets.
I heard a rumor that they were no longer going to come in tins, so I kept one. I don't collect anything particularly rare although I have a few things I don't think many other people have such as J. Edgar Hoover's autograph and my credit card from Joske's (a San Antonio department store that went out of business many years ago). Mine is plastic, but I think my dad still has his mother's tin credit card from there. My mother is the family collector.