I always saw 35. Tried to check, what I found was for the moment this, which also says 35M
https://www.crunchyroll.com/es-es/a...inspires-international-live-action-production
Still, Shueisha treats Saint Seiya as a 50million seller. Reborn! has sold as much as Saint Seiya and you don't see this treatment.
Also, with all these spinoffs, I find surprising how Saint Seiya hasn't sold like 70 million copies lol
PD:
I'm remembering that Jump sales video of begininng of 2018 where Shokugeki had 14M and Hero Academia 12M. How times change.