I have 24 Amps sitting in my stash but I'm 46, scared to use it.
I really think you could get good money for them, not to use but as a collectors item, like old wine bottles or whatever. Unfortunately they are illegal so kind of hard to sell openly.
I do wonder how long sealed amps might hold in potency or at least safe to inject. I'd suspect sealed amps from the 90s might still be good but I don't know. A while back I got a strip of Tramadol a friend got from his grandma's medicine cabinet, expired circa 95, still felt fully potent, but it depends on the substance and how it's been stored, temp/light exposure etc.