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01 — Acquire
Buy Coins & Banknotes
Browse our online shop, or contact us directly for private offerings and want lists.
International Coin Dealers & Numismatic Auctions
Coins, banknotes & bullion — bought, sold & auctioned.
Founded in Auckland, Aventine is the choice of coin collectors, estates, investors and institutions — connecting New Zealand to the global numismatic markets.
- TradeMe 3,600+100% Positive Feedbacks
- NGC · PMGAuthorised Dealer
- SpinkNew Zealand Agent
Where to begin
Three ways to work with Aventine
Whether you're building a collection, realising an estate, or chasing a single rarity — start here with us.
02 — Realise
Sell or Consign Coins
Outright purchase, brokerage, or auction consignment — the choice is yours.
03 — Bid
Coin & Bullion Auctions
Monthly sales with bidding from $1. 0% Buyer's Premium. No GST Surcharges.
Sigma Metalytics · NGC · PMG
New Zealand Submission Centre
Official coin and banknote grading by NGC and PMG, with metallurgical verification services.
Contact Us
Resuming Late 2026
Trusted across New Zealand
The choice of collectors and estates.
100% feedback rating with over 3,600 positive responses on Trade Me
Market Insights, Research & Collecting Opportunities
The official publication channel of Aventine and Coin & Bullion Auctions — market commentary, collection highlights, auction news and research from New Zealand and beyond.
17
May
254-Year-Old “Resolution” Medal from Captain Cook’s Second Voyage to New Zealand Repatriated
The Resolution & Adventure Medal can be traced directly back... Read more
01
May
The “Jersey” Collection of New Zealand Banknotes Part I
Meet Us at MIF 2026 Maastricht - The World’s... Read more
01
Apr
Incredible New Zealand $20 Banknote to Sell for $1,000+ NZD
New Zealand. Reserve Bank of New Zealand. Series 7. Graeme... Read more
12
Mar
Ever seen this many New Zealand £50 notes together?
When collectors sell their coin or banknote rarities, they constantly... Read more
