In a pre-industrial society people didn't throw things away because they were old.It would be quite common to own tools, weapons, furniture that you inherited.Even used clothing was popular item at the Pawn Shop.Having something that looked 300 years old wouldn't normally be period (except for some furniture), but owning items that looked 20, 30 years would be.
I live in a world where metal is cheap and I still hunt with weapons that my grandfather once owned.I also drive a 1979 Jeep
Swords, firearms, musical instruments were very labour intensive and expensive items. People used them until they were beyond repair. People also purchased , or liberated new items as well.
And nothing looks new after six months at sea.
-CS