I'm a big fan of both swedish "Antikrundan" and the British AR. I've
though quite a bit about what to bring if I were to go.
It's my impression that things don't have to be particularly old or
valuable to get shown. If it's odd and interesting you have a chance.
I'd bring:
1. I have a doohickey that I think is used for aligning heads in
RP06-size disk drives. It comes in a nice wooden box and looks curious.
I'd bring that.
2. I'd probably bring one or two of my front panels. And if I got to
show those I'd ask of the viewers not to rip the front panel off the
computer, the computer is worth more!
3. Perhaps a few punch cards or paper tape.
Other than that, I think an Apple-1 is the only thing that would register.
Oh, please don't bring core memory, it will only drive the ebay prices up :)
Cheers,
Pontus.