Not really worth anything. They do not work as well or at all and are common enough that they don't even make good museum pieces. There were a couple in a display case when I was at Bruce nuclear and there are a bunch of them kicking around in the snow lab at the big nickel. They just get in the way. Newer equipment looks nothing like it so it really only has that going for it and for that reason it might be a conversation starter if you had it on a coffee table when you have guests over... not sure if that is worth anything though.