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11
Jul
Every owner of coins eventually faces the same question.
This 2026 guide answers one of the most common questions for New Zealand sellers: "How should I sell my coins?"
“Selling your coins is a matter of matching the right items to the appropriate sales channel to find the correct buyer”
Whether you have one coin or an entire collection, the objective is the same: understand what you own and choose the best balance of price, time, and effort. No single sales method suits every item or seller.
Start with your situation.
Most selling guides begin by listing where to sell, but that often gets things backwards. A rare coin requires a very different route from foreign change from travelling, and an estate executor may have legal responsibilities that a private seller does not. Start by identifying your situation and the outcome that matters most to you.
I've inherited a collection.
Inherited coin collections are the most common reason New Zealanders sell. Estate sales can involve additional considerations, including valuations, documentation, record-keeping, and distribution among beneficiaries. We are preparing a dedicated guide covering these topics in detail.
“Significant things may not always be obvious. Not cleaning your coins is the main rule, but other things such as original cases, certificates, handwritten letters, and ownership history can all affect what your item(s) sell for, so keep everything together as you found it until it has been assessed”
I’m selling a collection I’ve built over the years.
A lifetime collection is rarely of the same items. Most collections are like a pyramid, with a small number of valuable items at the top, a larger group of collectables in the middle, and common coins forming the base. One of the most expensive mistakes is selling every item through the same channel.
4 common routes:
- Outright/Cash sale: A dealer assesses the collection and pays immediately. This is the fastest and most certain route when payment times and simplicity matter.
- Consignment and Private Treaty: Better items from a collection are sold on your behalf over time, to collectors and specialists. Slower, but it allows items to find the buyers who value them most.
- Auction: Significant items are put up for public auction, allowing collectors and dealers to bid on them.
- Sell it yourself: You market and sell the item(s) yourself directly to buyers.
A free initial assessment or purchase offer is different from a formal valuation, which usually costs a fee.
How Aventine Can Assist: A specialist such as us can assess a collection and divide it — purchasing the common and mid-range material outright, while consigning or auctioning the most significant items. This approach is how discerning collectors achieve the strongest overall result.
I have one coin—or a small group of coins—that may be of value.
For high-value coins—whether a single piece or a small collection—the key is choosing the sales channel that reaches the right specialist buyers.
How Aventine Can Assist: We can assess your item and recommend the most suitable sales route—whether that’s a direct purchase by us, a New Zealand auction, an international auction, or, where appropriate, selling it yourself.I have jars, albums, boxes, and everyday old coins.
Most modern coin accumulations in New Zealand are ultimately sold in bulk or for their metal value (with exceptions), especially those from the Industrial Revolution era, with the development of mass production. A useful first step is to separate them into current legal tender, obsolete currency, precious-metal coins, collectable coins, and common bulk material.
That does not mean anything is worthless - pre-1947 New Zealand circulation coins contains a silver alloy, while many damaged post-1947 coins can still be redeemed through the Reserve Bank — but it does change the sensible route for selling.
General marketplaces such as Trade Me can be a suitable direct selling option to maximise value, provided you have the time to photograph, describe, list, insure, post, and manage buyer enquiries yourself.
It is worth knowing one thing about how that market works, though: a meaningful share of rare coins and banknotes sold publicly in New Zealand is ultimately bought by dealers and their agents — Aventine included.
How Aventine Can Assist: We actively buy on public marketplaces and other auctions in New Zealand, for ourselves and as representatives of specialist buyers.
It makes sense to just ask us whether we can beat the offers you’ve been presented with.
If it is outside our specialty or not something we are currently buying, we will tell you plainly — and you can list it publicly with greater confidence that you are not missing out.
What sales options cost you — and what it means for you
Sellers make better decisions when they understand what each option costs.
- Dealers earn the difference between what they pay and what they eventually sell for. That margin covers their expertise, administration, insurance, cash commitments, resale costs, and risk they take on — you are paid today; the dealer may hold the coin for years, as well as potential liability when selling to buyers.
- Auction houses charge the seller a percentage fee / commission of the hammer price upon a successful sale of their goods.
How Aventine Can Assist: For substantial collections or suitable items, Aventine negotiates with global auction houses, resulting in a combined commission fee ranging from 1% to 10% of the hammer price (among the lowest in the NZ market), including all applicable fees. T&Cs apply.
- Marketplaces leave the work of selling — and the risk/liability of the transaction — with you.
None of these models is wrong. They price different services. The mistake is paying for a service you do not need — or failing to use one you do.
How Aventine earns differently — and why it matters when you sell
Beyond the above, two concepts set Aventine apart in the New Zealand market.
Aventine+ Membership. Our paid subscription tier serves a small group of serious investors and specialist collectors who want dealer-concierge services, such as our acting as their personal shoppers and representing them at auctions and with other dealers.
How Aventine Can Assist You: If you decide to have your coins auctioned with someone else, let us know regardless, as our clients pay us to inform them of item(s) they may wish to purchase regardless of who is selling them.
The Golden Ticket. From the 1st to the 10th of each month, transactions agreed with us beforehand that are processed via Trade Me receive a premium rate above our standard offers. As this promotion is available for a limited period each month, it is worth considering the timing when considering selling. T&Cs apply.
Before you sell anything: five simple rules.
- Don’t clean your coins. Not with a cloth, not with silver dip, not “just a quick polish.” Cleaning permanently damages a coin’s surfaces and can potentially reduce its value dramatically.
- Keep everything original. Cases, certificates, envelopes, invoices, and old collection notes may support value. Do not “tidy up” a collection before assessment.
- Avoid splitting items up — especially among family members — before it has been assessed as a whole.
- Photograph if selling remotely. Group photographs are fine for an initial assessment from us.
- Take advice before paying for grading or appraisals. Third-party certification through NGC and PMG genuinely matter for significant coins and banknotes — but the cost of this service can exceed the value of low-value items.
Frequently asked questions
Is it safe to send coins for assessment?
Reputable specialists use insured, tracked, signature-required shipping. Aventine’s handling is covered by a specialist HW Wood insurance policy, and for substantial collections we can arrange in-person assessment anywhere in New Zealand.
Is Trade Me a good place to sell?
It can be, for the right material. For anything significant, the buyer may ultimately be a specialist dealer such as us, due to our global reach, which enables us to reach more of the right buyers.
What if I decide to sell to someone else?
This is where Aventine differs from most of the trade. If you’ve received an offer from a private buyer, another dealer, or an auction house, tell us the amount offered, the payment terms, any fees or conditions, and how long the offer will remain open. We can give you an opinion and whether we can beat them. Sometimes we can; sometimes the offer in front of you is better, and we’ll tell you so.
How do I know if one of my coins is valuable?
Rarity, date, condition, and demand all play a part, and appearances mislead — which is why a preliminary assessment costs nothing. Aventine’s access to commercial sales data costs thousands of dollars each year and includes sales records not available to the public.
Selling your coins: Summary
Match the right channel to the items you are selling. Get the whole collection assessed before selling any of it. Keep everything original. And when in doubt, ask a specialist who can offer every route — outright purchase, brokerage, New Zealand auction, or international consignment — rather than only one.
Aventine provides free initial assessments of coins and collections nationwide. Email us at sales@aventine.co.nz, or arrange an appointment at our Auckland office or our Wellington and Christchurch satellite branches.
Aventine Numismatics
