For sale is a fully functional PowerBook 5300.
It's it fully stock form and in very good cosmetic condition
http://farm6.static.flickr.com/5287/5375071970_5021c7bd77_b.jpg
The specs on this machine are:
100 MHz PowerPC 603e
16 MB RAM
500 MB hard drive
9.5" Gray-scale display
The battery doesn't hold a charge, but I've read that these are good candidates for rebuilding.
Apple display adapter included.
$30.00 plus shipping