You are buying the classic vintage RPG "Pirates and Plunder" by Yaquinto publications in 1982.  This boxed set includes three play booklets, a character sheet pad and maps.  And a terrible tiny dice from the days when you had to colour in the numbers with crayons as a bonus!

It's all in very nice condition for it's age, with only the top of lid of the box showing some crush marks.  See photos which are of the exact item and depict everything you will be getting.