There are a number of ways the GB and Empire Stamps site can be searched to find the items you are looking for.
1. USING KEY WORDS
From the home page you can enter a key word or words e.g "black", "missing phosphor" "SG ???" . The search function will identify any listed item that includes these keywords either in the item title or item description.
If on Home Page and search term placed in "search box" it will search whole site.
If one first selects a category from the "choose category" box just to left of search box and then enter search term it will search just that category.
If one selects a specific store and then enter a search term it will search only listings in that store.