Which God of War Ragnarok is the most expensive?

As an avid gamer and collector of rare video game items, I'm particularly intrigued by the recent release of God of War Ragnarok. I've heard whispers about limited edition versions and collector's items being available for this game, and I'm wondering - which edition of God of War Ragnarok is considered the most expensive? Is it the standard release, or is there a special variant that commands a higher price tag due to its exclusivity or unique features? I'm eager to learn more about the most valuable option for those who want to truly indulge in this epic adventure.