Judas Priest is celebrating an impressive milestone – over 50 million albums sold in their 50-year career.

The heavy metal legends were presented with a special plaque ahead of their induction into the Rock And Roll Hall of Fame last month.

Over the years, Priest has put out six albums certified gold and four albums certified platinum. Their all-time biggest seller is 1982’s Screaming for Vengeance, which went double-platinum in the U.S.

Why did it take so long for Judas Priest to enter the Rock Hall of Fame? Which metal band should be inducted next?