Many AFX sets have been released over the years.  The sets listed here are a partial list.  Some were released only  outside the U.S. (Japan, Australia, etc.) and a large number of earlier sets were produced for companies or specific stores (Sears, Wards, etc.) to sell.  Many of these specific sets have cars or liveries that were not available elsewhere and may have been sold for a short period.  See Wikipedia article for more information.