Nah, Ronaldo was worth it at the time. He was the best player in the world at that time. 80 for Ronaldo wasn't unbelievable to me at that time. Neymar isn't double the player Ronaldo is or was then.

The money paid for CR7 was ground breaking and shocking at the time. In hindsight he been worth every penny. But that world record been discussed for months after.
Second of all cr7 in ManU was a completely different player then at RM and very much comparable to Neymar in terms of stats and entertainment.