Search Relevancy Issues Good example.

My keyword search  terms are sony laptop @bestbuy.com

See the following screenshot with the search results.

Clearly I am looking for sony laptop & results contains all types of items.

Also many marketplace items. 

I am looking for items from Bestbuy.

After selecting 4Gig/8Gig facets & Bestbuy Item tab, systems display all the laptops. 

See the following picture.

(You can try the same query at amazon  or Walmart and feel the difference.)