Norton Site Pricing

Hi,

 

I have Norton Internet security antivirus software 2008 on my computer which is asking me to renew my subscription. Why is this £39.99 on the official site yet I can purchase the product much cheaper elsewhere eg. Amazon or eonsoftware or many others?

 

When I asked support they said the sites were offering bogus products but this is nonsense as many purchasers leave very positive feedback.

 

Any information would be appreciated.

 

Steve