DEMO MODE: these simulate the OAuth consent flow.
Production wires real Google / Facebook sign-in via Supabase Auth.
This is where the real provider consent screen appears.
You can switch anytime from the header.
Same demo dataset as the seller scanner — try 70985301114 (Saga #1), or a full 17-digit code with issue supplement: 75960604808530011 (ASM #300). Catalog auto-sorts chronologically — year · title · issue.
Production hands off to Stripe — numbers never touch this site; the demo stores last-4 only. Test like Stripe: any Luhn-valid number works, cards ending 0002 are declined by the issuer.
Mods can remove chat messages and mute users. Muting silences chat only — it never stops bidding or buying. Blocking shuts a user out entirely: no chat, no bids, no purchases from you; if they're leading the current lot, their bid is voided and the lot resets to the opening price. Only you can appoint or remove mods, and only you can block a mod.
Any grade shown as “EST. GRADE” or “est. grade” is an automated approximation generated from limited data. It is NOT a professional grade. Kipa Comics is not affiliated with, endorsed by, or certified by CGC, CBCS, PGX, or any grading service. A book’s actual grade can only be determined by submitting it to a professional grading service. Condition defects (color-breaking ticks, restoration, pressing candidacy, interior flaws) may not be reflected in any estimate.
Estimated values and recent-sale comps are informational only. They are not an appraisal, an offer to buy, or a guarantee of resale value. Comic markets fluctuate — sometimes sharply. Nothing here is financial or investment advice. Do your own diligence before buying, selling, or bidding.
Kipa provides tools and data; buyers and sellers are responsible for their own listings, prices, bids, and purchase decisions. Condition of raw (ungraded) books is as represented by the seller.
This is a SIMULATION build: data sources, estimators, payments, and other bidders are simulated stand-ins for the production systems.
Catalog your whole collection with the same scanner and data sellers use. DEMO: no real charge.
Wins are charged automatically the moment the hammer falls — that’s how live auctions stay honest. Pick what’s on file. DEMO: nothing real is stored or charged.
Plus Stripe’s standard processing (2.9% + 30¢) on card sales, itemized on every receipt. Sellers over $5,000/month unlock a −1% platform-fee discount. Buyer loyalty credits are funded by the platform, never deducted from your payout. Integer-cent math throughout.
Powered by Stripe Connect in production: buyers pay into the marketplace account; your shipping rule triggers the transfer. New sellers carry an extra 3-day hold after scan while history builds.
Auto-purchased the moment a sale lands, paid with the buyer's shipping fee — you never front label costs. Tracking attaches to the order and the buyer's library automatically. Production: Shippo/EasyPost API buys real USPS labels server-side.
State machine: available → listed → sold (terminal). Sold items archive with sale price and net after fees.
Graceful end lets the current lot finish and the winner get charged before the show stops. End Now cancels the running lot — no charge.
Demo dataset stands in for Metron / GCD. Full codes with the 5-digit issue supplement are recognized (e.g. 75960604808530011 → issue #300). Try: 75960604808 (ASM #300) · 75960607724 (UF #4) · 76194123056 (BA #12) · 70985301114 (Saga #1) · 75960601234 (Hulk #181). Production: barcode → Metron API / GCD (CC-BY-SA) via a server proxy; grade estimate → trained condition model.
Your current plan’s platform fee + Stripe processing apply at sale — see “Your plan & fees” above. No listing fees, ever.
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The seller reviews your request. Approved refunds return every cent the way it came in — loyalty credit to credit, wallet to wallet, card to card (demo). Production adds platform-mediated disputes with photo evidence and a response deadline.
Stored balance spends before your card at checkout (after loyalty credit). Whole-dollar top-ups, integer-cent math. Production note: stored balances = money transmission; state licensing or a partner (Stripe Treasury) is a legal requirement, not an option.
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Year-aware tier suggestion. Links go to CGC's real submission pages — fees and turnaround change, so verify there before shipping books.