Battle.net card pack code unused

Description

Sale is for a 3x5 card that has a gold colored coin that can be used to reveal a code to get a free card pack on Battle Net.  The coin was never used to reveal the code and the code remains unused.  This was from a 2016 Lootcrate box so I do not know if the code is still valid or not.  It is being sold as a novelty item and although the code may still work I am not claiming that it is still valid.  Please pay within 3 days.  Thank you.