Sell Your Coins, Banknotes & Collections in New Zealand

Or simply find out what they’re worth. 

Send us photos and any known details - including ownership history for a free review by our Katalognator AI and human assessors — whether you have a few coins or an entire collection.

How It Works

1. Send photos.
Email photos of your item(s) to sales@aventine.co.nz, or upload them at dropmefiles.com and email us the share link (no sign-up or personal details required). Group photo lots are more than welcome for your convenience. 

2. We review.
Our AI and human agents will analyse your photos and inform you whether your item(s) are something we specialise in and for the best sales approach, whether an outright purchase, public auction, or a retail consignment sale. We also welcome walk-ins and appointments at our public office in Auckland, and private appointments at our Christchurch and Wellington satellite branches. For substantial collections or high-value items, our specialists can arrange an in-person evaluation anywhere in New Zealand.

3. Next steps.

If it’s worthwhile for you, you’re welcome to book an appointment at our office in Auckland — or we can send a prepaid, signature-required NZ Post CourierPost bag so you can send your items to us safely.

Inherited a Collection? Not Sure Where to Start?

We assist executors, estates, and individuals who have inherited or come across coins, banknotes, medals, or bullion and simply want to understand their options. If you need a formal written valuation for insurance, probate or estate purposes, we offer that as a separate service — just let us know.

Frequently Asked Questions

Do you buy entire collections or estates?
Yes. Group photos of multiple items are welcome and make things easier for you.

Will you buy outright, or sell on my behalf?

Either. Depending on the item, we may make an outright purchase or place it in a public auction — we’ll advise which suits best.

How are offers calculated?
We quote on an outright settlement basis. A premium timed-payment rate is available on request.

Can I send items by post instead of visiting?
Yes — we can dispatch a prepaid, signature-required NZ Post CourierPost bag to you. 

Where are you, and can I visit?
At our public office in Devonport, Auckland during our open hours or by appointment.