Be patient as the two stages it takes the most time in is research and ID, then the actual grading step
So you want some number of difficult-to-answer cards that naturally line up well against their removal, which can help close out games once the initial aggression is handled by them
For starters, the price of Sunderflock is predominantly tied to the Izzet Elementals deck, so if it falters, its price may crash
Hes playable but its going to take some testing to see if he becomes a big part of the meta
Interestingly, older PSA 10 cards (with "2" certs) often have minor flaws, so this newer, cleaner certification likely commanded a premium
Especially if youre looking for something thats not technically made for MTG or trading card games in general