In a normal 60 card format, even as a 40/40, its killing anyone without regard to life gain in a single hit
Bonus points there
If you don't mind minor scratches and scuffs, this is a good value set
In the previous Greater Basilisk example, an opponent will likely take the damage rather than sacrifice a larger creature to the basilisk, allowing you to play Giant Growth for even more damage
The fact that a mid-2000s Gold Star, a 2002 Shining card, and a 2000 Gym Challenge holo all sit in the top 10 alongside modern SIRs and the legendary Base Set variants speaks to the unique position that Charizard occupies in the market: there is no era of the game where Charizard is not relevant, and there is no era where the best Charizard card is not among the most valuable cards printed
As chance would have it, Banzai works well as both a challenger and a quester