CDs = Somewhere around 7,000 to 8,000. Maybe more. I stopped counting a few years back. Back in 2001, I sold around 1,000 of them at one time, and it didn't even look like it made a dent in the collection. That was eight years ago, so you can imagine how that's grown since.
LP's = around 1,000
Concerts = 300 or more. I'm not entirely sure of the exact number.
I've worked in the music business