i recently had one of those in my hands for a short while, then i gifted it to someone who needed a computer. Its a decent comp, it ran Windows XP fine....
When i picked up mine, the grfx card was shot, i think it was a 32mb Geforce 2 or Vista or something. Anyway if you replace the card and reset the bios i think you should be in good shape. any AGP card or even PCI card will do for now, what do you plan on using it for?
Specs of it should be similar to a 800mhz Duron, i added 192mb of mem to the one i had, if you plan on running XP then you should have at least that... I think it came with Window ME tho and a 40gb hard drive