Not only can you use it to find out the value of your own cards, but you can also use it to keep track of market prices and trends
Category 4: Mana Base 4 Breeding Pool 1 Forest 4 Glacial Fortress 4 Hallowed Fountain 3 Hinterland Harbor 2 Sunpetal Grove 4 Temple Garden No, you're not miscounting
Scyther Scyther (10/64) is arguably the most competitively significant card in the entire Jungle set

$12.99 Traxos, Scourge of Kroog (0020 - Giant of Babil) Final Fantasy Through the Ages $139.99 Tifa Lockhart (0536 - Borderless Surge Foil) Final Fantasy Variants $17.99 Muldrotha, the Gravetide (0057 - Orphan, Cocoon fal'Cie) Final Fantasy Through the Ages $29.99 Kenrith, the Returned King (0023 - Noctis Lucis Caelum) Final Fantasy Through the Ages $34.99 Jodah, the Unifier (0017 - Warrior of Light) Final Fantasy Through the Ages $10.99 Bruse Tarl, Boorish Herder (0050 - Hugo Kupka) Final Fantasy Through the Ages $13.99 Mizzix's Mastery (0041 - Dawn Warriors' Legacy) Final Fantasy Through the Ages $32.99 Sram, Senior Edificer (0003 - Firion, Swordmaster) Final Fantasy Through the Ages $0.79 Strixhaven Stadium (0063 - Luka Stadium) Final Fantasy Through the Ages $4.99 Dovin's Veto (0051 - Shadowbringers) Final Fantasy Through the Ages $37.99 Gix, Yawgmoth Praetor (0035 - The Shadow Lord) Final Fantasy Through the Ages $32.99 Chromatic Lantern (0061 - Crystal of Altar Cave) Final Fantasy Through the Ages 0 results found

That, and the related Gigantamax Pok mon that were introduced in the recent expansion, are an example of the new mechanics the TCG introduces each year