Scooby Doo is like Spider-Man for the young generation.
Flintstones = Superman
Well, if that is indeed the case, then since Action 1 is still valued at a higher price point than 'Tec 27, shouldn't a book like Dell Giant #48 (i.e. 1st comic book appearance of The Flintstones) from 1961 be valued at a higher price point than the first comic book appearance of Scooby Doo in 1970?
Sadly, I suspect that most younger people and kids know the Flintstones more from cereal commercials than they do from the actual cartoon show. On the other hand, Scooby Doo has been almost continually in the pop culture mainstream since it debuted in 1969. That's why Scooby Doo is greater than Flintstones.
I love the Flintstones and would love to see that property rise to the level of Scooby Doo but it ain't there right now.