Every Pokemon game is self-contained, and Omega Ruby/Alpha Sapphire is just as good a starting point for a fledgling Pokemon fan as any, and just as good a continuation/remake as any
Market value is the most accurate way to assess the value of a card
A supplier that promptly answers your questions, provides detailed information, and is easy to communicate with is more likely to offer good service throughout the order process. In case of any issues with the products, such as damaged cases or incorrect sizing, the supplier's after-sales support becomes crucial
A highly tuned, competitive deck (known as cEDH) will create a miserable experience if pitted against three casual, unmodified pre-cons
Once that dungeon has been completed, the combos will no longer work since Acererak will remain on the battlefield instead of returning to your hand