Before buying a used copy of the game, check the CUSA number on the disc. If you see CUSA06381, ensure the PS Store region on your console matches the US store to avoid DLC hell.
3.55 (initial) / 5.05 (for later patches/DLC)
If you need a added (e.g., a Redump-style log or a missing DLC report), please provide the full game title and any checksums you have.
Have you confirmed your CUSA ID recently? Check your disc spine now and ensure your DLC library matches.