I own almost all of the SpongeBob "theme" compilation discs, but that wasn't a good move in retrospect, because owning just the season boxsets gives you more episodes, more space, more bonus features, and doesn't have any repeats.
They recently re-released an old SpongeBob DVD from the early 2000s, but they gave it a completely different, more modern cover to trick people into thinking it's a new DVD.
Still waiting for a TUFF Puppy DVD...