I have got a stash.
Bought while they were still modern and standard issue. That says something about me. I almost never cleaned a chain back then. I just switched to a new one. Often. That meant that I bought chains in bulk - and I still got a stash of NOS ones and sh*tload of used ones that have few miles on them. I could start to clean the used ones but I will probably not get around to it until the NOS ones are used...
One silver and five gold
Some Regina Oro and Record
Nickel plated Regina America SL (three new and at least four slightly used ones somewhere)