I hate to be the stereotypical "dude with one post making FS listings" - although I had an account here years ago (I was the one with a dual-HDD/headphone jack'd blue Duo 2300c, among others 
) - but I thought that this might be something of interest to a few folks here.
In any case, I'm selling a PB550c, the Japanese-market 68040 5x0. It's in good shape, and has the box and all the documentation / Japanese software and such. It's got 36mb of RAM and a 750gb drive.
I s'pose that's pretty much it. Here's a link to the eBay page.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200211435471
Dang, he's got the original install disks and the box too. If I knew the bidding wouldn't go over $200, I'd probably snag it.