It looks like a decent deal (after purchasing an OS)

If you want to go Windows XP, you need to buy a full version of the OS, as there are registration keys in the OS which will lock up the computer if you don't register the OS. If you use a reg key from another system it won't work, as it goes online with microsqaush and checks the keys. If you know someone who has a copy of 2000 professional, however, you can use that. Win 98 isn't very compatible with a lot of the s/w on the market now. Some says it is, but reality is something else entirely.