Ultimate Jazz & Blues

One of these "listener-digest" huge budget sets compiling in 30 discs a range of jazz musicians, apparently drawing the takes from public domain material.
If cheap, maybe this is a good dig for absolute beginners who want an overview about things. Amateurs, obviously, stay away.

The Mingus disc consists exclusively of early 1945-49 singles, probably ripped from the (way superior) "West Coast" Mingus late anthology.