Where could I buy a cheap pre-loaded windows XP Pro system?

Since vista came out this is all but impossible. I've tried bust buy for business but their stock is high-end. Does anyone have any good tips? : ).

Thanks!

Where could I buy a cheap pre-loaded windows XP Pro system?replacement windows

microcenter or tiger direct

Where could I buy a cheap pre-loaded windows XP Pro system?windows mail internet explorer

try ebay.com tigerdirect.com or amazon.com
Here's some links
Try a local computer repair center, they take computers in as trade ins you should be able to find a good used computer and they should be able to put whatever OS you want on it
Try Wal-Mart if you have one where you live.
Dell business systems still sell XP Pro computers