There are subcategories within these rarities that make things a bit more complicated, but at the most basic level you can determine rarity at a glance by looking at the symbol to the right of the collector card number
Prominent owners or viral topic appeal Record auction transactions While 1st Edition Base Set Charizard is a symbol of high-value cards, it was a card obtainable from commercially sold packs, and its mechanism of rarity differs from cards that could only be received by tournament champions or contest winners
While being a sorcery does weaken it a bit, it's a big upgrade to other cards with similar effects, and especially strong in Final Fantasy Limited formats
Akromas Will I separated Akromas Will from the other protection spells because its ostensibly a finisher, first
Craterhoof Behemoth One of the best mass-pump spells in green and the big green finisher of many peoples choice, Craterhoof Behemoth shares the feature of a lot of the cards at this point on the list, in that its seen multiple reprints over the years but still holds a fairly staggering cost of $27.99