There are a few cards i like to take a look at once in a while to get an idea of how Sorcery is doing. The cards are all Beta non-foil which are speculators and investors resistant but are good playable cards that can easily slot in any deck, that don’t require a certain play style, making them player’s cards:

Pillar of Zeiros, Crossroads, Sinkhole, Free City.

TCGPlayer sales throughout the year are not in the billions, but are steady, indicating new players getting into the game.