Any strategy that puts cards into your graveyard , whether that be mill, dredge, delve, discard, or even directly placing cards into your graveyard with the intent of playing them later, will benefit from having cards with flashback
TM204 Double-Edge 120 100 15 -- A reckless life-risking tackle in which the user rushes the target
Another big mathematical hurdle is that theres actually a difference in the consistency of your draws between a 60-card deck with 24 lands and a 600-card deck with 240 lands
Condition, rarity, and grading are the top factors
Clone decks, artifact decks, just tokens decks, and decks that like to run Mechanized Production
Another notable find that hangs around $1000 is the iconic Juzam Djinn