you want to buy a second-hand xp version right?
now in germany they are round 150€ for professional and roundabout 100€ for home (new versions).
technically you would need to look for the original cd with the license sticker and serial. having a look at ebay and amazon shows that a reputable source (high numbers of sales and positive votings) sell new ones for same price as in shops and the second hand ones i found are all recovery versions (a thing to watch out for).
I have read that if you get a copy that has been resold a few times, MS is not so happy with the serial and updates and that small problems arise (but not sure on that one).
i would just go and buy the home version, unless you have a network and need the additional features from xp pro.
alternatively you could download the vista beta (which is free til 2007) and then buy a full version for 99€ (thats the prize they said vista is not to exceed in europe ?!?).
hope this helps.
rgds frm germany
Edited by Yourhighness, 10 June 2006 - 02:19 AM.