Our Services

At CoinNumber.online, we specialize in the niche but highly valuable world of old and historic currency coins. From ancient coins and colonial-era mints to rare banknotes and discontinued national currencies, our platform offers a full range of services to help collectors, investors, and sellers engage safely and confidently in this unique and fascinating market.

Coin Authentication & Verification

At CoinNumber.online, we understand the importance of trust and authenticity when dealing with old and collectible currency. That’s why we offer optional authentication and verification services to ensure the coins you buy or sell are genuine, accurately described, and fairly valued.

Marketplace for Buyers

Discover a curated selection of authentic old currency coins from trusted sellers around the world. Whether you’re a passionate collector, history enthusiast, or investor, CoinNumber.online makes it easy to explore, compare, and purchase verified coins with confidence.

Listing & Selling Coins

Have a rare or historic coin to sell? At CoinNumber.online, we make it simple and secure to connect with collectors and buyers who value what you have.

📝 Easy Listing Process

Create a free account, upload clear photos, describe your coin accurately, and set your price. Our platform guides you step-by-step.

🛡️ Secure Transactions with Escrow

We protect sellers and buyers with a secure escrow system — ensuring payment is only released once the buyer confirms satisfaction.

🏷️ Reach a Targeted Audience

Your listings are seen by a community of collectors, investors, and enthusiasts actively looking for rare currency coins.

📈 Boost Trust with Verification

Increase your coin’s credibility by opting into our optional authentication and verification service.

Personalized Support

Have questions about a listing, coin value, or transaction?

Our expert team is here to help
Support via email, live chat, or scheduled consultations

Whether you’re buying, selling, or just exploring, CoinNumber.online is your trusted destination for rare and old currency coins.