I own the base version of Borderlands 2 but I never bought any DLCs.
Today I got the full collection of Borderlands 2 for only $10.
2K is flogging their wares in preparation for the arrival of Borderlands 3. This is a lot of DLCs for B2. I don't know if I'll ever play it, but it beats trying to buy each DLC at full retail price later. "Patient gamer" is the best gamer.