u/EnergyAware7858

I'm looking for a help.It is a coin that really confused me a lot,I saw this coin is selling,the price is very cheap.only take about 700bucks, Is this a real?or a counterfeit?I recently know this type is widely falsed during 70s~90s,some of them are well made,and it's really hard for me to get the book about this coins history.