I bought a 500 mhz 128 MB ram comp at a garage sale recently for 50 cents. It was dirty and the side panels were not attached, but it actually works perfectly.
AND it was actually a good comp.
Actual AGP video card, actual sound card, 15 gig hd, and a real live no kidding rockwell 56K ISA hardware modem (never seen an actual hardware modem over 33.6K that I didn't buy myself). Normally every system I ever work on has a 56K software modem that is a complete mystery modem that half the time is unidentifiable (windows can't tell what kind it is, never works with any of the drivers for the 6 different modems the manufacturer used in that model, etc, etc. I must have like 15 of those unidentified softmodems laying around).