A Vivid Voltage master set includes all standard cards, reverse holo versions, and Secret Rares for a total of 345 cards 185 standard set cards , 142 reverse holos , and 18 Secret Rares
Similarly, if the copy says that it affects an "opponent," it affects an opponent of the copy's controller, not an opponent of the original spell's controller.
(1) Gladiator Beast monsters you control cannot be targeted by your opponents card effects, except during the Battle Phase
After sorting through anything that could be made money off of, I did sell some, and then ultimately, I donated the rest to a local charity
This is what the grading company will use as an insured and replacement value should something happen to your cards when they are in their possession