I also picked up a PowerBook 100 from eBay. The PB100 is very small and light (the floppy drive is external). All I have to do is replace the SCSI hard drive as it is hosed (I have a few spares).
An original Mac OS 7.6 CD. I intend to use it on the Quadra 950 mentioned earlier. If anyone knows the largest hard drive partition 7.6 will handle please email me.