Who cares how many they sold? Let's be careful not to mistakenly equate commercial success with musical merit. Just think of the rubbish we'd be discussing here instead of a group that broke up thirty-eight years ago.
Personally speaking, if I were to bother listing, say, my top twenty favorite Beatles songs, most if not all of them wouldn't even be singles, let alone "million-sellers."
No offense is intended at all, by the way. I don't mean to sound snooty. I know it's harmless enough, it's just a message board, etc. etc. Sometimes, I just can't help but say something. Maybe I'll just go have a cigarette.