At Danireon, you can pre-order most new TCG releases, including booster boxes, elite trainer boxes, booster packs, blister packs, and more
trading cards I believe people from newer generations are much more likely to invest in things like trading cards (from trading card games like Pokemon as well as, if not even more, sports trading cards, etc.) Things that used to be almost exclusively "nerdy" (like video games, Pokemon, Star Wars, etc.) are becoming "cooler" and cooler by societal standards and are even starting to see interest that could only be seen in the sports world in the past (large-scale sponsored events
However, time has been kind to Gym Challenge, and the Rare Holos from this set command a high price
Because N is an ever present factor in Standard, you need to consider that every Mail in deck increases your odds of hitting a Supporter after your hand is disrupted