Ever heard the Beatles albums? Or the old Kiss Casablanca vinyls ? (bad drum sounds)Those albums sold more than the over compressed loudness adjusted "super mix" albums ever will. Good songs> good drum sounds.
How much an album sells has nothing to do with how well it's mixed. Not sure you why you even mentioned that.
Also how much something sells doesn't equate if it's good / bad / whatever. If following that logic Justin Bieber is one of the best artists of all time :p