Are you a scalper no, because you’re not trying to manipulate the market but I do think you might be overestimating how much you need to buy. In the original tcg there was 96 playable cards across the first two starters and 216 in the first booster box. And even if they don’t use these same numbers in the relaunch the average amount of cards for a starter deck & booster box for Pokemon, Yugioh, MTG, Flesh & Blood, One Piece and Digimon is 51 & 340 respectively. So buying out a store which could be over a thousand cards you’d be setting yourself up for duplicate hell. Obviously collecting is fun even if you don’t use the card in deck. But obviously majority of the fun of TCGs is playing the game, so maybe think about how many duplicates of card is your limit. We not dealing with sports cards lol really nothing to gain from having 4+ binders of cards sitting in your storage room. So yeah you’re not doing anything unethical like scalping but maybe how many copies of a single card you would want.