Canoptek Spyder might be expensive for a 60-card format considering it's five mana and doesn't just win the game, but every Commander deck with Vehicles in it should be running this card
Just dont forget to cancel it before youre charged
As opposed to cards like Moat that just leave your opponents creature in play (until the can find an answer), The Abyss will destroy these creatures, and even prevent your opponent from continuing to play creatures (on account that they will eventually be sacrificed)
you cant play more than two colors if you want to leverage these and even thats pushing the bar
Across all categories, card value usually comes from: Scarcity (low print runs or no reprints) Demand (Commander, Legacy, collectors) Condition (graded cards sell higher) Aesthetic appeal (art, foils, alternate versions) Historical importance (early sets, iconic cards) How to Sell Magic: The Gathering Cards Safely If your cards have value, you can sell them through trusted channels