The Ensign Selfix 820 Special is a British folding roll-film camera that takes 120 film, produced by Houghton-Butcher (Ensign) in the post-war period. It sat at the upper end of the Selfix folder range when new, intended for photographers wanting a pocketable medium-format camera.

At UK auction in recent years, hammer prices for the Selfix 820 Special have ranged from about £110 to £210, with only a small number of recorded results to anchor a median near £160. Today the model trades in a thin market at saleroom level, so what one sells for depends heavily on shutter condition, bellows integrity and completeness of the case and finder.