You can always sell to regain some money if you arent happy with your purchases but its a lot more simple to give it a bit time and study the topic first, these arent any one time opportunities after all that you miss if you arent buying now, its at least here a somewhat common saying that with set cards theres always another copy to buy
Because of that, I'll focus on the best of the best, with a few fun exceptions
In general, heres a condition scale mostly used to grade cards: Mint condition (MT) Near mint (NM) Lightly played (LP) Moderately played (MP) Heavily played (HP) Damaged (DMG) 2
It gets bigger and gives you an additional combat phase when it attacks the player with the most life for the first time each turn
Yeah, thats going in the "do not trade" pile
No, but change your approach