Card stores can provide you with information regarding the most recent market prices of your cards, and if theyre interested enough, they can even buy your cards on the spot
Even just paying one mana to turn this spell into a basic land card is going to be useful in some games, but being able to find any creature you need, especially in a format like Commander, can be the difference between winning and losing
Iconic examples include: Wheel of Fortune (Red) Windfall (Blue) Time Spiral (Blue) Echo of Eons (Blue) Magus of the Wheel (Red creature version) In a vacuum, these are symmetrical effects
Once you have your cards sorted, go online and pull up a card appraisal service or market, like TCGplayer, MTG Price, or Card Mavin
Cards go to the graveyard after being played unless a card says otherwise
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