I'd
assume all three are NTSC, but I'm multi-region so don't take my word for it.
The Vicol Blu-ray is from a genuine HD master, so if you care most about image quality go for that.
If you want original mono you'll have to go for the remastered Mei Ah DVD.
https://www.ebay.com/itm/god-of-gamb...ss!92602!US!-1
The oldest DVD is cropped, has burnt subs, and is generally best avoided.
No idea why it's so damn expensive. Greed, I'd imagine...