§1 Registration & the auction §2 Bidding & increments §3 Extended bidding §4 Auction house fee §5 Payment & settlement §6 Authenticity guarantee §7 Consignor terms §8 The demonstration build Terms of Service →

Conditions of Sale

Effective July 2026 · Version 24.1 · Auction 24, Summer Premier. This page is part of every bid you place.

§1 · Registration & the auction

Minthouse Markets, Inc. operates premier auctions for graded trading cards: Pokémon, sports, and TCG grails. Every lot is consigned through our specialists, verified against the grading house census, and sold under the mechanics on this page. We are a marketplace of record: every price realized is published.

  • Registration requires a verified payment method or a connected wallet. Watching any lot is free; bidding requires registration.
  • Each lot closes at the time posted on its lot page; sessions run across the auction week, and extended bidding (§3) can move any close later.
  • Each lot sells to the highest bidder at or above any reserve when the lot closes. The hammer price plus the buyer’s premium (§4) is the price you pay; sales tax applies where required by law.
  • The auctioneer may reject bids that appear erroneous or manipulative.

Most lots are No Reserve. Select Premier lots carry a confidential reserve, never above the low estimate. Under no circumstances does the system place any bid on behalf of the seller at or above the reserve. A lot that closes below its reserve passes unsold. The lot page shows the state plainly: Reserve met or Reserve not met.

Descriptions are the house’s opinion, not a statement of fact. Lots sell as is; condition information is guidance only.

Bidder identities are never published; bid histories show anonymized handles. We use your contact details to run your account and settle invoices. Nothing is sold to third parties. Wallet addresses are retained for compliance screening only.

§2 · Bidding, maximum bids & increments

There are two ways to bid, and both are binding.

  • Maximum bid. Enter the most you’d like to pay, and we bid on your behalf at the lowest winning price, never above your maximum. Your maximum is sealed and never shown to other bidders.
  • Exact-amount bid. A single bid at or above the next minimum. You hold the lot at that amount until someone raises.

When two maximums compete, the higher one wins at one increment above the lower, or at the higher maximum exactly when the gap is under one increment. Equal maximums: the earlier one wins.

Bids are binding and cannot be lowered or withdrawn, only raised.

Minimum raises follow this ladder:

Current bidMinimum raise
Under $100$10
Under $500$25
Under $1,000$50
Under $5,000$100
Under $10,000$250
Under $25,000$500
Under $50,000$1,000
Under $100,000$2,500
Under $250,000$5,000
$250,000 and above$10,000

§3 · Extended bidding

A bid placed inside a lot’s final five minutes moves that lot’s close to five minutes after the bid, anchored to the bid itself rather than added to the old close, and capped at 30 minutes of total extension per lot. Lots close independently and may close out of numerical order.

§4 · Auction house fee

The auction house fee is added to the hammer price of every winning bid. It is tiered and marginal: each rate applies only to the portion of the hammer inside its band, exactly like tax brackets, so the effective rate falls as the hammer rises and the total never jumps at a band boundary.

Portion of hammer priceRate
First $2,5007.5%
$2,500 – $10,0006.5%
$10,000 – $100,0005.5%
$100,000 – $1,000,0004.5%
Above $1,000,0003.9%

Worked examples: a $1,000 hammer pays a $75 fee (7.5% effective, $1,075 all-in); a $50,000 hammer pays $2,875 (5.75% effective); a $500,000 hammer pays $23,625 (4.73% effective). The lot page shows the exact fee at any bid you type, before you place it, and your invoice itemizes it to the cent. Estimates never include the fee. Fixed-price Buy Now listings carry no fee, so the listed price is the full price.

§5 · Payment & settlement

Your invoice issues at close and is payable within 10 days of the invoice date. Invoices are denominated in US dollars and settle in USDC at 1:1, so the dollar figure on the invoice is the amount you pay. Fiat onramp options are available at checkout. For amounts above the $10,000 onramp cap, the OTC desk introduces you to an independent provider, and Minthouse never takes custody of or converts your funds. Onramping is provided by Peer Pay, a third-party service. Minthouse does not profit from onramps, holds no customer funds at any point in an onramp, and is not a money transmitter or money services business. Invoices unpaid after 10 days may be voided, with the lot released.

  • The invoiced dollar amount governs; converted crypto amounts shown are for guidance only. At invoicing we quote a spot rate, locked for 15 minutes; a locked rate that expires unfunded is requoted at the then-current spot. Overpayments are refunded in kind; underpayments are returned and the invoice reissued.
  • Payment is complete at the confirmation depth shown on your invoice, and title to the lot transfers on confirmed payment, not before.
  • Settlement addresses are generated per invoice and displayed only in your account, never in email. Verify the address in-app before sending.

Lots ship signature-required FedEx Priority within two business days of settlement. $45 flat, free on invoices over $10,000, insured door to door at invoice value. International shipments clear through our customs broker; duties are the buyer’s responsibility.

Or leave it with us: winning lots rest in the climate-controlled, insured Minthouse Vault free for 90 days ($9 per lot per month after), and vaulted lots can be re-consigned to a future auction without ever shipping.

§6 · Authenticity guarantee

We guarantee the heading line of every lot, meaning the set, the card, the grade, and the certification number, for 5 years from the sale date.

  • If you come to doubt the heading line, give us written notice within 3 months of learning of the doubt.
  • The slab must return intact and unaltered.
  • The sole remedy is rescission: we refund the hammer price plus the auction house fee.
  • The guarantee runs to the original buyer only and is non-transferable.

Grades themselves are the grading house’s opinion; we sell the certified card, not a promise of regrade. Every holder is inspected against tamper and counterfeit markers before listing and again before shipment.

§7 · Consignor terms

Seller commission is 0%, and the house earns on the auction house fee instead. A flat $19.99 for insured shipping is collected at settlement.

  • New consignments with a low estimate under $10,000 are offered in Weekly (No Reserve) sales. Lots of $10,000 and above sell in Premier sales, where a reserve up to the low estimate may be set.
  • Premier seller bonus, paid on top of the hammer and funded from the auction house fee: +10% on hammer to $250,000, +12.5% to $1,000,000, and +15% above. Negotiable on six-figure consignments.
  • Settlement lands in USDC once the buyer’s payment has cleared, the card has been delivered, and the 7 day buyer protection window has run with no dispute open. An open dispute holds proceeds until it is resolved. Settlement is exclusively in crypto.
  • Unsold lots return at the consignor’s expense, or move to the Minthouse Vault free.

Consignments begin at sell with us. Bidding and invoices go through your account specialist; press and partnerships reach the front desk at Minthouse Markets, Inc., New York.

§8 · The demonstration build

This is a demonstration environment. The catalogue is illustrative: lots, certificates, and population figures are not real inventory, and no lot ships. Bidding itself is real: bids run through the live auction engine, close on the real clock, and produce real invoices.

The mechanics on this page are the mechanics in the build: the increment ladder, the sealed-maximum resolution, the extension clock, and the reserve logic run exactly as written here. Nothing on this site is an offer to sell. Payment rails are connected, so settling an invoice through Peer Pay moves real funds, but no payment is ever required of you here.