I've seen any number of old Albert and Boehm horns, both soprano and bass, and you can always tell the horns that were "kept together" all of the time. First, the corks are all destroyed. Second, the joints that are most likely to be "stuck" are the ones that get damaged and that shows it in the horn's later life. Nothing like trying to get one unstuck.
One of the clarinets that I've bought over the years was a quality metal Selmer. On the website, it looked very good.
Mechanically it worked just fine, but the barrel showed the obvious signs of being stuck and having to be wrenched apart with some sort of pliers. Not fatal damage, but not the sort of state of perfection that I'm used to with my horns.
Break the thing down, clean it out, and put it away...