I need a copy of vista / xp pro

[Tuffty]

Basicly I'm in the market for a copy of vista ultimate or xp pro,
I don't really want a oem version as I tend to tweak and change bits including the mother board, And I know the oem versions can be picky about that.
So has anyone got a retail version of either for sale or know a cheap place to pick one up?

 

[NHN]

PM me mate can supply with genuine license at very fair price

 

[klauster]

both retail and oem are exactly the same as far as reinstalling and activation