If you manage to secure a copy, you aren't just getting the original 2011 experience. The Prepare to Die Edition (and the separate Artorias of the Abyss DLC) adds significant meat to the bones of Lordran:
If you are downloading this game for the first time, the title "Prepare to Die dark souls prepare to die edition ps3 download
If you are buying digitally, the "Prepare to Die" edition usually entitles you to the DLC. If you are buying a physical disc second-hand, be very careful. Many physical PS3 boxes were branded "Prepare to Die," but the DLC was actually a voucher code inside the case. Since the PS3 store has gone through changes, these codes may have expired or require specific redemption processes that are no longer supported. If you manage to secure a copy, you