Want to start collecting, worried about decay

[CosmicDwarf]

Thank you very much for the replies, everyone. I'll definitely persist with this even if things are going to decay a bit - I can always buy extra copies of certain things if I'm worried they might decay from overuse.

I will also try to create the right kind of environment for storing games and consoles and the like. I mean, overexposure to sunlight isn't exactly going to be a problem... not in the Highlands anyway, but I'm concerned about damp. I'll see what I can do.

When it comes to tape demagnetization though, what could I do to preserve something like a Sinclair Spectrum/Commodore 64 game casette?