I'll impart some of my insight with my own experience with trading especially on etiquette and processes of trading with other players (No, we are not engaging with scamming people out of their high value cards and I am not delving too deeply into MTG finance)
Rare (Yellow): Unlocked at Shop Level 5 Epic (Pink): Unlocked at Shop Level 12 Legendary (Red): Unlocked at Shop Level 20 If you click on the Card Expansion button in the Workbench, you'll also see a Tetramon Ghost pack, but there's no way to buy this pack from your phone
They took a genuine WotC-era holographic card and removed the ink using chemicals, leaving just the holographic surface (including the Galaxy Star pattern)
Following the recent price rise, a Mew (25th Anniversary Collection [S8a] 095/078) card sells for 18,000 JPY (~US$116)
Though for me theres nothing more iconic than Final Fantasys splashy Summons powerful spells which bring forth a monstrous ally to fight alongside you until they perform some big finisher
Its a 5-mana 4/3 that gets you a card back, at the very least
