Seller School
No theory, no guru talk. Everything below is how the store actually runs, written so a brand-new seller can copy the workflow tonight.
Start with these five
How to Ship a Trading Card (So It Arrives Mint)
CleanDEE's exact card-shipping build: penny sleeve, rigid sleeve, team bag, thick mailer — about $1.10 all-in — plus the bubble-mailer rule for $20+ cards.
The $2.96 Floor: Pricing Math That Keeps You in Business
Why CleanDEE never lists below $2.96: the floor math (about $1.10 to ship before fees), setting your floor before you list, and holding it when a set crashes 70%.
List 50 Cards With Just Your Phone (No Scanner Needed)
CleanDEE's phone-photo listing workflow: 50 cards at a time, front and back, honest photos of the exact card — why consistency beats gear, every time.
What Sells Where: My eBay vs Whatnot Triage Rules
CleanDEE's inventory triage: duplicates and $20+ hits go to eBay, small low-value cards run on Whatnot at $1 starts, and how the two channels split the work.
PWE vs Bubble Mailer: When Each One Is Right
Plain white envelope (non-machinable) or bubble mailer? CleanDEE's two triggers — over $20, or thicker than 1/4 inch — and why the protection build never changes.
Learn it, then shop it
Every lesson here is how the store actually runs. See it in the wild: