RetroGaming

All you can really do is make sure the contents limit on your insurance is up to date and you have documentation of what you had. I had to do this with a guy once when I told him his renters policy had $10k of contents coverage. He then told me he had thousands of CDs and DVDs, mid to late 2000's, as he collected them. Updated that to ~$100k real quick.

Maybe you could get a company like Chubb, they have a history or writing strange and expensive things, to write a one off stated value policy but the cost would probably be prohibitive.