I wonder if Trevor is watching these auctions, be interesting to see some PPC cards re-appear for classic machines at an affordable price.
I was hoping to see the Amiga Walker prototype.. someone must have it hidden away.
Not sure what you think these auctions would have to do with PowerUp cards. The designs were by Phase 5 and were sold to DCE when P5 were in financial trouble.
If you got the schematics from DCE they'd not be much use since many of the components used would not be available or ROHS compliant.
You'd have to design a whole new system which would probably be more expensive than a SAM, would be less powerful and strangled by the buses on your Amiga which itself wouldn't be much more than an I/O dongle.
Can't remember if there were more than one prototype of the Walker but there was one guy who used to frequent the Amiga forums who had one. I think he put up for sale some years back.