I did a search for some computer components - and often the best price was HP-Sales.co.uk
On visiting the site it had the HP logo and colour scheme - but no price. Even stranger the domain was registered to a house in america.
Basically - the sites are offering the best price - but then its unavailable on the site - but suggests you try their search to source the cheapest supplier.
Somehow I see the result being the one offering the greatest referral fee rather than anything to do with value for money.