About the BPPC. I already replied a couple of PMs about this, but let's copypaste it here also.
There are several symptoms, probably all of them power related or in best case just bad / oxidation in connectors:
1) Gives red screen when powering on the computer, when entering kickstart. You can get to the card settings (ESC while powering on), but get red screen on kickstart (checksum error). Kickstart chips are flawless so this probably is caused by the remapping to fast ram before entering kickstart.
2) Sometimes does not show up at all, nothing in the expansion cards list of kickstart. Unplug/replug usually fixes this, even better with warming up the card first.
3) When it worked perfectly, had some SCSI issues. While SCSI works, resetting SCSI-bus (when scanning the bus in HDToolbox for example) hangs to OS.
That's pretty much it. Red screen problems showed up when the card was unused 6 months or so, unplugged from the computer, before that everything worked great apart from the SCSI problem. And by the way, it's 603e+ with 210MHz PPC and 50 MHz 060, latest rev. with full MMU/FPU.
These are really expensive @ eBay, but since this is buyers risk basically, I'd depart from the card for 300€ since I do not have time to play with it my self. It's steep I know, but if you get it fixed you could easily get over 700€ for the card.
Mikolas