This was £20 on Facebook marketplace and is a nice compact desktop designed with the usual Compaq attention to detail. After a good clean it's had some minor upgrades with parts I had laying around - the 866MHz socket 370 Pentium III was upgraded to a 933MHz part, the 128MB of PC133 SDRAM already fitted upgraded to 512MB, and the 15GB HDD replaced with an 80GB item. The latter has a slower spindle speed (5400rpm instead of 7200rpm), but the extra space allows for a dual boot with Windows 2000 and Slackware 15.0. :-)
The downsides are two: firstly, there's no AGP slot, and the onboard graphics is Intel's 82816 which is a pretty hobbled option. I have now upgraded this with an HIS Radeon 9250 128MB PCI graphics card. The other downside is the PSU is a proprietary 120W unit with an unusual pinout, and the one on this machine is a bit broken. +3.3V, +5V and +12V are on all the time, even when the machine is powered off, and the PSU fan runs even faster when "off". I'll need to fix this or find a replacement.