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id=1 price=10 colour=red weight=100 etc etc
you could then use mysql select to allow your users to provide more information within the search box, or even use an "order by" link within the results.
select from 'Products' where Colour = 'red' and price = '10'
You couch then sort by colour using something like...
select * from Products where colour = 'red'
Hope this gives you some ideas and points you in the right direction.