When searching for duplicates, you can use the "Search older deals" function located on the right hand side of the screen. this option comes up after your initial search.
Remember, freebies can never be re-submitted on Buxr, and sometimes they can linger for a long time on the Internet. This means a freebie could have posted a long time ago, but you need to use the "Search older deals" to find it.
If you find one that is still available but older, just flag it as "Alive Again".
Try to use unique words to narrow down your search results, and/or combine two or three words to further narrow the results.
Example: Searching for "algebra", and then initiating the "Search older deals" function, only produces a mere 3 results to look at.
Example: Searching for "math", and then initiating the "Search older deals" function, produces 31 results. A difference of ten times as many results!
Make sure your "customize the view" box has these selections: "Expired: Show" and "Area: All Deals". This will guarantee you don't miss deals available in select cities, or expired deals. More info about customizing your deals view can be found on this wiki page: