Usually by the time I get the deck I want together the format has evolved, either because of a new set or simple because players have adapted to strategies and now my deck is obsolete
When a player leaves a multiplayer game, any continuous effects with durations that last until that player's next turn or until a specific point in that turn (such as the effect of being detained) will last until that turn would have begun
But remember, an expensive Energy card today can drop in value as the market fluctuates according to buyer demand, seller supply, and trending chase cards
For just a single mana in any color identity, you can turn off creature reanimation and green battlefield tutors such as Eldritch Evolution
Its probably why each card keeps getting a little worse, and why Drana, the Last Bloodchief looks like she could use a wellness retreat
Theres no reason for grinders and players to buy cards from each other at full retail when other grinders and players would be more than happy to undercut SCG/Channelfireball and secure the sale, so TCG low is a more commonly used number to start from when conducting sales between two non-store parties
