Slab & Stream

First-run setup for a new owner: introduce Slab & Stream, offer quick add (type name, set, number) as a no-setup shortcut, otherwise ask one at a time for their name, categories, existing spreadsheet, Whatnot fee and grading company preferences, then invite one photo of a card stack.

Use when a seller types one card as name, set, and number (e.g. "Charizard ex, Obsidian Flames, 223") and wants it looked up and added to the master sheet with every column filled, without photos or the full first-run setup.

Use when a seller pastes a card list, shares a CSV or spreadsheet, or sends card photos (Pokemon, sports, One Piece, League of Legends Riftbound) and wants them turned into master inventory rows before pricing. Identifies and flags, never prices or guesses.

Use when a seller sends a photo with several trading cards laid out together. Splits it into per-card crops (recreating the splitter helper if missing), reads each card, confirms set and number, flags anything unclear, and hands rows to card-price-lookup and inventory-sheet.

Use when a seller wants current prices or comps for cards (Pokemon, sports, One Piece, Riftbound), or wants the sheet re-priced for market movers. Returns sold medians per marketplace with counts, a low/mid/high band, PSA 9 and PSA 10 sold medians with sale counts, and source plus as-of time. Sold comps only.

Use when a seller wants to create, import, or update their master card inventory xlsx: add cards or copies, apply prices, log listings or sales they report, see net after Whatnot fees, auto bulk lots, run order, Worth Grading calls, stream view, market movers log, or a show recap. Recreates the tracker helper from spec if missing.

Use when a seller wants to group cards into show-ready Whatnot runs (solo spots, mid bundles, bulk lots) with comp total vs ask, tune the auto lots, or regroup after prices move.

Use when a seller wants stream talking points for cards or lots, or a show run order. Uses only looked-up sheet data, never made-up stats or grade claims.

Use when a seller wants Whatnot-ready listing drafts (title, description, price) for cards or lots. Drafts only, never posts.

Use when a seller is offered a lot or collection (list, CSV, or photo) and wants to know if the asking price is worth it. Returns comp total, est. resale after Whatnot fees, walk-away max, and a Worth it / Thin / Pass read. Advice only, never buys, bids, or offers.