Windows 7 on Amazon, reduced from £229.99 to £159.85. Not bad until you see...
Snow Leopard (latest OS for Mac) on Amazon, reduced from £25.00 to £22.99.
Even now, after all this time, Microsoft continues to rip off all you poor PC users with its substandard OS at a vastly inflated price. I can think of no reason why Windows 7 should not be thirty quid. Not one single reason. Apart from Microsoft's rampant greed, that is.
We're using Snow Leopard at home (got the family license deal for £40) and it's great! What I've seen of Windows 7 is very poor - just a rehash of Vista which nobody even likes anyway.
Windows:
http://www.amazon.co.uk/Microsoft-Windows-Ultimate-Full-Version/dp/B001XCWGII/ref=sr_1_1?ie=UTF8&s=software&qid=1252098196&sr=1-1
Mac:
http://www.amazon.co.uk/Mac-OS-Snow-Leopard-DVD/dp/B001AMHWP8/ref=sr_1_1?ie=UTF8&s=software&qid=1252098233&sr=8-1