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 markets.

  • TradeMe 3,600+ 100% Positive Feedback
  • NGC · PMG Authorised Dealer
  • Spink New 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.

01 — Acquire

Buy Coins & Banknotes

Browse our online shop, or contact us directly for private offerings and want lists.

View Shop Items

02 — Realise

Sell or Consign Coins

Outright purchase, brokerage, or auction consignment — the choice is yours.

Talk to a Specialist

03 — Bid

Coin & Bullion Auctions

Monthly sales with bidding from $1. 0% Buyer's Premium. No GST Surcharges.

Upcoming Auctions

Auctions · Sales Events · Collecting

Stay Connected

Be the first to hear about upcoming auctions, exclusive sales events, and new collecting opportunities. Subscribe to our joint newsletter below.

Trusted across New Zealand

The choice of collectors and estates.

5.0 from 41 Google reviews

100% feedback rating with over 3,600 positive responses on Trade Me.

Aventine+ Media

Market Insights, Research & Collecting Opportunities

The official news channel of Aventine and Coin & Bullion Auctions — market updates, highlights, auction news and research from New Zealand and beyond.

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