Hum,
The final Windows Vista prices, classified by product editions (SKUs) just leaked over the web:
-Windows Vista Home Basic - €200 or $255.55 or £135.95
-Windows Vista Home Premium - €400 or $511.10 or £271.90
-Windows Vista Ultimate Edition - €500 or $638.88 or 339.87
-Windows Vista Business - €650 or $830.54 or £441.84
-Windows Vista Enterprise - €800 or $1,022.20 or £543.80
(They seem a bit high so i would suspect the authenticity)