Why Collect Banknotes? History, Scarcity & Real Price Data

Real history. Real scarcity. Real numbers.

Every banknote is a small, printed piece of history — a record of revolutions, wars, hyperinflations and new nations. But collectors often ask us a second question too: do banknotes hold their value? We dug into the published research and real, dated sales data so you can judge for yourself. Here is what the evidence honestly shows.

1. A century of evidence from collectibles

There is no academic study of banknotes alone yet, but the closest relative — collectible postage stamps — has been studied over more than 100 years. Researchers Elroy Dimson (London Business School) and Christophe Spaenjers (Tilburg University) found that British collectible stamps returned an average of 7.0% a year between 1900 and 2008, ahead of government bonds (5.4%) and gold (4.7%), though behind shares (9.2%).

The same researchers stress the other side of the story: prices of collectibles can be volatile, depend on collector tastes, and buying and selling involves dealer and auction costs. A 2026 follow-up study found that collectors typically accept a somewhat lower financial return in exchange for the enjoyment of owning what they love — smallest of all in specialist fields like stamps and coins. In short: collect for the history and the joy; the long-term value is a welcome bonus, not a promise.

2. A fast-growing collector market

Interest in paper money has grown dramatically. PMG (Paper Money Guaranty), the world's leading banknote grading service, certified its 1 millionth note in January 2015 — and passed 10 million notes in 2025. That is ten times as many professionally graded notes in about a decade.

Top-end results keep making headlines too: in October 2024 Stack's Bowers sold nearly $2.5 million of world banknotes in a single Maastricht sale, and in 2025 a 1953 Malaya & British Borneo $1,000 note sold for S$260,000 (about US$194,000) at Noonans — a world record for a Queen Elizabeth II banknote.

3. Case study: Hungary 100 Million B-Pengő (1946)

Printed during the worst hyperinflation ever recorded, this note represents 100,000,000,000,000,000,000 pengő — the highest denomination banknote ever put into circulation. Auction results for About Uncirculated examples went from $98 in October 2022 to around $240 from late 2023 through 2026 — and in 2025 top examples sold on eBay for up to $400.

See our Hungary 100 Millió B-Pengő →

4. Case study: Zimbabwe 100 Trillion Dollars (2008)

When Zimbabwe abandoned its currency in 2009, its 100 trillion dollar note became a worldwide symbol of hyperinflation. In 2014 news reports said it sold for about $5; by 2015–2016 eBay prices of up to $35–$57 were reported; and single uncirculated notes sold at auction in 2024–2026 for a median of around $70.

See our PMG-graded Zimbabwe 100 Trillion →

What makes some banknotes rise in value?

• Scarcity that only grows. Once a note is withdrawn or demonetised, it is never printed again — and every year fewer examples survive in top condition.
• Condition. Crisp, uncirculated notes — and especially PMG-certified ones — are the most sought after.
• A great story. Hyperinflation, wartime and record-denomination notes attract collectors far beyond numismatics.
• Collector demand. Fashions change: some countries and themes become "hot" for years at a time.

How to collect wisely

• Buy what you love and what interests you — enjoyment is the one return that is guaranteed.
• Choose the best condition you can afford, and consider certified (PMG) notes for higher-value pieces.
• Store notes flat, in archival sleeves, away from light and humidity.
• Think long-term: dealer and auction costs mean short-term flipping rarely pays off.

Start exploring: Our Most "Extreme" Banknotes · Hyperinflation notes · PMG-certified notes

Important: This page is for general information and collecting interest only. It is not financial or investment advice. Past prices and returns do not guarantee future value; prices of collectibles can fall as well as rise, and individual sale prices vary with grade, variety and market conditions. Auction prices quoted are hammer prices before buyer's premium; eBay figures are from Extreme Banknotes' own market observation of 2025 sales.

Sources: Dimson & Spaenjers, "Ex Post: The Investment Performance of Collectible Stamps", Tilburg University (reported by Phys.org, July 2010); Dimson & Spaenjers, "Investing in Emotional Assets", Financial Analysts Journal 2014; Evidence Investor on Dimson, Pukthuanthong & Vorsatz (2026); PMG, 30 Jan 2015; CoinNews, 20 Jun 2017; CoinWeek, 29 Apr 2020; PMG, 25 Mar 2025; CoinWeek, Oct 2024; Greysheet, May 2025; Numista / Katz Auction results, Hungary P-136; AP via Fox News, Nov 2014; Reuters, Jun 2015; Arab News / The Guardian, May 2016; Numista / Katz Auction results, Zimbabwe P-91.