You have to be careful with only 320 HP for this giant legendary Pokemon, but the ability to discard Energy for 80 more damage and a Retreat cost of 2 Energy help you hang onto this card for a little longer
ST21-015-roronoa-zoro makes sure you don't lose on threats in play when he's KO'd, forcing opponents to continue playing defensively throughout the game
As you step into the realm of grading, remember that its not just about the cost
Yes, there was a time when that would have been an unrealistic goal, or at least lead to a deck with very limited gameplay patterns
Before I get into too many details, however, let me give you some background
It was because you had to go down to #19 before you got to a Magic: The Gathering sealed product