Most beginner mistakes are not about taste. They are about paying before checking format, photos and sold comps.
The big mistakes
Buying the story instead of the wrapper evidence.
Comparing wax, cello, rack and blister packs as if they were interchangeable.
Trusting current asking prices without sold results.
Ignoring seller photo gaps.
Assuming every slab deserves the same premium.
Storing packs under weight or in unstable humidity.
Start small, build a photo checklist, and save sold comps before chasing scarce packs.
