There is no shame in gaining inspiration from the decks that work for the pros, as long as the player knows how the deck works before they start investing time and money
You can list cards, cosmetic items or booster packs that youre willing to part with, or search for other people selling the cards youre after with prices that are in your budget - or at least your spares pile
inflict damage to your opponent equal to that monster's original ATK
That Mewtwo, released to celebrate the release of the expansion, bears the Brilliant Stars logo in the same area where the Trick or Trade stamp is found, and is both the rarest and most valuable version of the card
In multicolor decks it gets even better: Oracle of Mul Daya, Blood Artist, Kiki-Jiki, Mirror Breaker, Phyrexian Metamorphyes please
Read more about the Alpha and Beta versions on Wikipedia