If they have grown a community of players and maintain a healthy card inventory through resales, thats a strong sign that they are a trusted retailer
That being said, this red and white deck looks solid based on the deck list, and the idea of cards living a double life both in hand and in your graveyard is fun to manage and can create some hectic token creature army situations
Japanese booster boxes are a different beast entirely
Hazezon has desertwalk he can't be blocked when the defending player controls a Desert and every time a Desert you control enters the battlefield, he creates two 1/1 Sand Warrior tokens
Some of the most valuable cards in Maestros Massacre include: Determined Iteration Spellbinding Soprano Cascade Bluffs Body Count Syrix, Carrier of the Flame Extravagant Replication Make an Example Smuggler's Buggy Flawless Forgery Dimir Signet Cryptic Pursuit Rite of the Raging Storm Twinning Staff Xander's Pact Sinister Concierge Clone Legion The Verdict Maestros Massacre is a deck that very strongly plays into its own strengths
Notably, Triumph of the Hordes is an excellent Overrun effect with the added benefit of granting the infect keyword to creatures that don't have it
