I have been an enormous Marx Brothers fan since that 70s revival. This is wonderful news. Their comedy was years ahead of it’s time.
I’m a big Marx Brothers fan, too. You might enjoy the “A Night at the Opera” copy that has a commentary by Leonard Maltin. Maltin’s commentary adds a lot.
I got the DVD on Amazon years ago. I just checked. It’s still available on Amazon. It’s the one currently for $11.20.
There are other versions of the movie available. I don’t know if they include the commentary or not.