Rough math... more or less 33 boxes x 150 each = 4,950
This spans all years/genres: New England '50s/'60s, New England '70s/'80s, U.S. punk/indie '70s/'80s, worldwide 1990s-present punk/garage/etc., plus reissues.
Pulled out a random 1990s box to see if the 150 estimate was accurate, and there...