Extra SUPERCOIN is exactly what it says - an extra coin! It costs less because there is no DVD included.
It's the best choice if you already have SUPERCOIN DVD 1 and just want another coin or a different denomination coin. Choose the coin you want from the drop-down list. Extra charges are shown for some coins in the list.
IMPORTANT: Make sure you first have SUPERCOIN with DVD 1. It teaches the proper handling of the coin along with several must-have routines.