I have a whole LC475, without the drive (I still has the drive sled). The drive failed, but I've tested the unit working with another SCSI drive. Configured with 16MB RAM, and 512KB VRAM. One of the smallest form-factor vintage Macs.
http://picasaweb.google.com/simplepractices/FSLowEndMac#5359141408129615490
http://picasaweb.google.com/simplepractices/FSLowEndMac#5359141410086147106
A recent Quadra 605 (similar motherboard as the LC475) sold for $120+ on eBay. I'm only looking for around $50 for mine. Make me a reasonable offer if you are interested.
/Peter