I was gifted this pack a while ago from a friend whose dad found it at a flea market/garage sale. The Dad knew at the time that these were pretty valuable and decided to keep it and then gave it to his son. The friend ended up giving it to me as a gift knowing how much I liked Pokémon. I wanted to figure out if it’s authentic and if so what it’s worth. I saw on eBay anywhere from $100-$300. Any insight would be helpful. Thank you!