Cardstock, finish, and cut quality vary wildly
Modern collectors hunt for Special Illustration Rares, alternate art treatments, and Hyper Rares, viewing each new generation's premium Charizard as the flagship card of its era
The transform to saga cost is among the least of the March of the Machine praetors, and requires your careful deckbuilding to not get burned by stage III of The Argent Etchings
The most popular and most expensive example of a rare holofoil card from the first Pokmon TCG set is the famous Charizard Holo, which was printed using the popular Cosmos holofoil pattern and features iconic artwork by Mitsuhiro Arita
It isnt the worst, but its bad by todays standards
You are correct both of those cards are colorless