Well the difference is quite substantial here plus he wants to sell all 36 packs before he even breaks the seal which is smart
If you're unsure, compare it carefully to an authentic one
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Mercurial Transformation: You choose Frog or Octopus as Mercurial Transformation resolves, not when you cast it
Reward: Being Who Sees the End of the World Structure Deck Being Who Sees the End of the World
(You can only gain this effect once per turn.) If another "Synchron" monster is sent to your GY as material for the Synchro Summon of a Warrior or Machine Synchro Monster, while you control this card: You can Special Summon 1 "Synchron Token" (Machine/EARTH/Level 2/ATK 1000/DEF 0)
[2] If a monster is banished, face-up, while this card is in the GY: You can banish this card, then target 1 "Invoked" monster in your banishment