Pretty much all of my computers over the last 6 years have been built out of bits and pieces by me. The one I'm typing this with is an AMD K-6 233, with 64 megs ram, 8 meg video, 17 inch monitor, two 2-gig drives and running win95.
I have a pent 150 with 15 inch monitor, and a dual pent pro 200 with 64 megs and 2 4 gig scsci drives - both of which have FreeBSD installed on them.
One is the dialup machine for my little home network which we also use to surf on, play games, edit graphics and other things, and the other machine is one I use to practice stuff on, like installs, and trying out different server software.
I also have a Pent 150 laptop made by Toshiba - it has 80 megs or ram and 1. 2 gig hard drive space, and runs win95 as well.