[nineteen999]

There seems to be a few C64's including breadbin and C64C models on eBay most days that I look. Granted some may need recapping or other work done, but there are plenty of others in working condition or only needing minimal repairs. I think you could get one for not much more than $US200 + plus shipping.

[brokenmachine]

So funny that you could get a Raspberry Pi for like $5 that is orders of magnitude more powerful, and could even emulate a complete C64.

Everyone loved the C64 though, so fond memories are worth something.