A Captain America costume is always popular at Halloween. Captain America was born from an experimental super-soldier serum during World War II, transforming frail Steve Rogers into the exemplar of human physical perfection and a Sentinel of Liberty. Whether you are a fan of Steve Rogers or Bucky Barnes, a Captain America costume this Halloween is just what you need. A good place to get a discount Captain America costume is at eBay. Some sellers offer free shipping. Here are some of today’s eBay listings for a Captain America Halloween costume: