4x6 recipe card binder Standard Cards, Pack of 36 - Recipe Organizers with a prominent title Recipe Card Binder - 4x6,

Language: Korean

Add to that plenty of ways to put additional +1/+1 counters on it and many smaller synergies throughout the Standard format, and I expect Walking Ballista to be a Standard Staple from the start

As a general rule of thumb, a card with higher rarity will have more impactful in-game effects than one with a lower rarity

Only you can answer this question, but if you are curious about giving grading a try, and are grading for value, the safest bet is to focus on the household names: for baseball, Mickey Mantle, Willie Mays, Hank Aaron, Jackie Robinson, Roberto Clemente, Sandy Koufax, and popular Hall of Famer rookie cards are a good place to start