Module 7: The Consignment and Auction Pathway: When to Sell In-House vs. Refer Out

Why This Module Matters

Not every piece belongs in the store’s own case. Some pieces are genuinely better served by consignment to a specialty dealer, or by referral to an auction house, than by an outright purchase and in-house resale. Recognizing which path serves the client and the piece best — and understanding the real mechanics of consignment and auction commissions well enough to explain them credibly — is the skill this module covers.

When a Piece Belongs In-House

Most estate and trade-in pieces are well-suited to in-house purchase and resale: routine gold and diamond pieces with straightforward, verifiable value (Modules 4-6 cover exactly how to evaluate these), pieces the store can resell at a healthy margin within a reasonable holding period, and pieces without significant provenance or maker attribution that would benefit from specialized marketing. For these pieces, an outright purchase (a trade-in offer or straight cash purchase) gives the client immediate certainty and payment, and gives the store full margin control.

When a Piece Belongs on Consignment

Consignment — where the store displays and sells a piece on the owner’s behalf, without buying it outright, and takes a commission only on an actual sale — makes sense for pieces with real but uncertain demand: a signed designer piece the store doesn’t have deep specialized-buyer relationships for, an unusual or high-value item where an outright purchase would tie up too much capital relative to the store’s confidence in a quick resale, or a client who specifically wants to try for a higher price than an immediate cash offer and is willing to wait.

Consignment commission structures vary enormously depending on the piece’s value tier and the venue, and it’s worth understanding this range rather than assuming one standard split:

• General consignment shops and galleries commonly split proceeds 60/40 in the consignor’s favor (60% to the consignor, 40% commission to the shop), though the range spans from 50/50 up to 80/20 favoring the consignor depending on the shop and item category.
• High-end jewelry and luxury-goods consignment specifically tends to favor the consignor more heavily than lower-priced general merchandise, commonly landing around 60-70% to the seller (30-40% commission), since the high unit price makes a large percentage split financially unsustainable for the seller at that price point.
• Online luxury consignment platforms use their own structures — for example, tiered commissions that decrease as sale price increases, plus a separate payment-processing fee, are common in this specific channel.

A clear written consignment agreement is essential regardless of the specific split: it should specify the commission percentage, who retains legal title until sale (typically the consignor, until the piece actually sells), the length of the consignment period, condition/insurance responsibility while the piece is in the store’s possession, and what happens if the piece doesn’t sell within the agreed period.

When a Piece Belongs at Auction

Auction referral is the right call for genuinely significant pieces: a piece with a verified, notable maker signature (Cartier, Tiffany, Van Cleef & Arpels, and similar), a stone or piece with documented, exceptional provenance, or an item whose value is high enough and specialized enough that a major auction house’s global buyer network will produce a meaningfully better outcome than in-house or general consignment could. This connects directly back to Module 3’s outside-expertise referral principle — recognizing that a piece exceeds the store’s own specialized-buyer reach is itself professional judgment, not a failure to close a sale in-house.

Auction fee structures are genuinely more complex than consignment, and worth understanding precisely since clients will often ask directly:

• Buyer’s premium: an additional percentage charged to the winning bidder on top of the hammer price, paid to the auction house, not deducted from the consignor’s proceeds. This commonly runs 20-28% depending on the house and the hammer-price tier (some major houses use a sliding scale that decreases at higher hammer prices).
• Seller’s commission: a separate percentage charged to the consignor, calculated on the hammer price (not the buyer’s final price including their premium). This commonly runs in the range of 10-25%, though it is frequently privately negotiated rather than publicly fixed — major houses will often reduce or even waive seller commission entirely for sufficiently high-value consignments, since buyer’s premium revenue alone can make a strong consignment worthwhile to compete for.
• Additional costs: photography, catalog inclusion, insurance, and shipping are commonly billed separately to the consignor and should be itemized and agreed in writing before consignment.
• Timeline: the full auction consignment process — appraisal, condition report, cataloging, marketing, the sale itself, and final payout — commonly takes eight to twelve weeks from initial consignment to funds in hand, meaningfully longer than either an outright purchase or typical in-house consignment.

The Honest Conversation About Trade-Offs

Each pathway trades speed and certainty against potential upside, and being honest about that trade-off is the core skill here: an outright purchase gives immediate, certain payment but the lowest ceiling; in-house or general consignment offers a higher potential return with real timeline and eventual-sale uncertainty; auction referral offers the highest potential return for genuinely significant pieces but the longest timeline, the most complex fee structure, and no guarantee the piece sells at or above any hoped-for price (auction sales carry real non-sale risk if bidding doesn’t meet a reserve).

A Worked Scenario: The Signed Piece

A client brings in a piece bearing a verified Cartier signature and asks for a trade-in offer. Rather than pricing it purely on melt-and-wholesale logic from Module 4, the right response recognizes the piece’s category: “Given the Cartier signature, this piece has a specialized collector market that’s genuinely different from what our in-house pricing can capture — I’d actually recommend considering an auction consignment rather than a straight trade-in for this one. The process takes longer, typically eight to twelve weeks from consignment to payout, and there are seller and buyer commissions involved, but for a signed piece like this, the eventual sale price at a major specialist auction can meaningfully exceed what we’d be able to offer for an immediate purchase. I’m happy to walk you through exactly how those fees work if you want to explore that route.” This gives the client an honest, informed choice rather than defaulting to an in-house transaction that may genuinely undersell the piece.

Practice Exercise

Practice categorizing five hypothetical pieces (a routine 14k gold chain, a signed Tiffany brooch, an unbranded but well-made Art Deco ring, a large fancy-color diamond with a lab report, and a costume-jewelry-adjacent piece with sentimental but limited material value) into in-house purchase, consignment, or auction referral, and practice explaining the relevant commission structure and timeline for whichever path you’d recommend for each.

Key Takeaways

• Routine, verifiable-value pieces are well-suited to in-house purchase; pieces with uncertain but real demand often suit consignment; genuinely significant, signed, or exceptionally provenanced pieces are best referred to auction.
• Consignment commission splits vary widely by venue and category, commonly 60/40 to 80/20 favoring the consignor for general merchandise, and often 60-70% to the seller specifically for high-end jewelry; always use a clear written agreement covering commission, title, timeline, and unsold-item terms.
• Auction fees include a buyer’s premium (paid by the winning bidder, 20-28% typically) and a separate seller’s commission (10-25%, often privately negotiated and sometimes waived for high-value consignments), calculated on hammer price, not final buyer price.
• The full auction process commonly takes 8-12 weeks from consignment to payout — meaningfully longer than an outright purchase or typical consignment, and this timeline trade-off should be communicated honestly upfront.
• Recognizing that a piece exceeds the store’s own specialized-buyer reach and referring it to consignment or auction is professional judgment, not a failure to close a sale — and being honest about each pathway’s speed/certainty/upside trade-off serves the client better than defaulting to whichever option is easiest for the store.