In general, this requires a minimum of sixty cards in the deck, and, except for basic land cards and cards that have text superseding this rule, no more than four cards of the same named card
So, instead, I give you the best way to go based on your goal: For fun : The free methods are your friend, my friend
This allows you to haggle from an informed position at your local game store and get a fair price or price your stock competitively if you sell them yourself
Its pretty obvious why the Un sets were shelved after this for 13 years
Unlike many Sword & Shield sets that declined 3050% from launch peaks, S8A has shown resilient value retention due to three factors: limited supply, collector-focused design, and the ongoing appreciation of vintage-reference promos