New answers tagged faceted-search
Your description is a little confusing. So I'll state general information about facetted search. Almost everybody know how to use it. Amazon have it since a long time and most people 'at least' browse Amazon. It is used to narrow search results, or browse inside categories. Mostly because people hate paging and less options is actually better than 1000s of ...
I would consider adding an "Include items with unknown region" checkbox instead of an "Unknown" radio. Most likely, your users will not want to view only items that are unknown, but rather USA (for example) AND items that are possibly USA. This will make it clear that some items have an unknown region and provide the option to look through them in addition ...
Take tips from http://www.futureshop.ca/ try out their site on your phone. Just put on your jacket because you might get blown away by how easy it is too search. ie. Hierarchy searching. Biggest to smallest category (can stop and search in between)
I can't comment yet so I'll leave my comment in the form of an answer. Check out this design pattern article by Smashing Magazine: http://uxdesign.smashingmagazine.com/2012/04/10/ui-patterns-for-mobile-apps-search-sort-filter/ Head down to the Filter section to see the different filter design patterns.
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