I'm looking for older usb miners for collecting purposes
and I'm not paying anywhere retail for them as they're basically all unprofitable.
you are going to open a 'mining museum' ?
To me, Bitcoin related stuff is an especially interesting part of history, because I feel somewhat involved, watching the community grow/etc. I would like to have a few examples around, but I also don't have the money for this sort of thing.
So I will pay only a few dollars above what the hardware is worth in mh/s.