Like most Pokmon cards, the value of Max Potion depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Plasma Freeze)
Find them using Konamis Yu-Gi-Oh store locator
Introduces new members/support for the "D/D", "Dogmatika", "Dragonmaid", "Endymion", "Fabled", "Galaxy", "Gem-Knight", "Jurrac", "Magistus", "Mekk-Knight", "Nekroz", "Ninja", "Noble Knight", "Number", "Orcust", "P.U.N.K.", "Shark", and "Witchcrafter" archetypes, as well as the Albaz Dragon, Field Searcher, Motor and Signature move series
If you're stuck for deck-building ideas or need to build some confidence, you can also buy a pre-constructed deck
Solid Edges How to grade the edges Edges need to be sharp and have a solid color
Meanwhile, Dusk // Dawn is the only aftermath card that has an effect that is rare on its front half (and arguably on both halves, but more on this in a minute)