Hi,
I need help to randomize a search result without affecting the relevancy to much, its a product search website each product listing contains the sellers/companies website address if for example we search for washing machine and one seller got 20 different brands of washing machines then that seller will take up the 1st 2 pages of the result.

any advice will surly help

here you can see an example http://voruleit.net16.net/index.php?...Evottav%C3%A9l