I dont know that its fair for people who are in it for different reasons to judge, to say, Oh, youre not allowed to come over and make money on Pokmon. Its not illegal, its not necessarily immoral, but I think there are people who are like, Thats not right
In case you were wondering: The going rate is north of $250 for the non-foil copy of Stay with Me, aka Rhystic Study
Understanding card conditions is one of the most important skills in the Pokmon TCG community
Shuffle away the cards you dont need and keep only the best options
Elspeth can come down in the mid-game since she costs five mana, either establishing a board presence with her first two abilities or destroying a problematic creature of your opponents, making her a control players dream planeswalker
This will make it easier for you to evaluate the worth of your card collection