Rare T. Rex Skull Discovered in South Dakota Is Expected to Fetch Staggering Amount at Auction A fossilized T. rex sold for $31.85 million in 2020 — breaking records at the time.

By Amanda Breen Edited by Jessica Thomas

Angela Weiss | Getty Images

An extraordinary standalone Tyrannosaurus rex skull is about to hit the market.

Sotheby's will put the "first of its kind" fossil up for live auction on December 9, according to a release from the New York-based broker, and it's expected to fetch $15-$20 million.

Related: Turns Out There Were Once Billions of T. Rexes, and They Hunted Their Prey in Terrifying Packs

Discovered and excavated in Harding County, South Dakota at a "severely weathered" dig site where most of the rest of the skeleton was destroyed over time, the skull is one of the best and most complete ever found, per Sotheby's.

Fewer than a dozen fossils of comparable status exist in museums, and Maximus, as it's known, is on track to become one of the most valuable fossils ever sold at auction.

In 2020, Christie's auctioned off a fossilized T. rex known as Stan (named for the paleontologist who found him) for $31.85 million — making it the most expensive dinosaur skeleton sold to date, per CNBC.

Related: The Dino Cowboy Who Traded in Herding Cattle for Hunting T. Rex

Sotheby's will provide Maximus's buyer with full documentation certifying the condition, authenticity and legality of ownership at the time of sale.

Amanda Breen

Entrepreneur Staff

Senior Features Writer

Amanda Breen is a senior features writer at Entrepreneur.com. She is a graduate of Barnard College and received an MFA in writing at Columbia University, where she was a news fellow for the School of the Arts.

Want to be an Entrepreneur Leadership Network contributor? Apply now to join.

Editor's Pick

Business News

Zillow Predicts These 10 Places Will Have the Hottest Housing Markets in 2025

Zillow predicted that the hottest housing market of 2025 will be Buffalo, New York. Here's why.

Business Ideas

70 Small Business Ideas to Start in 2025

We put together a list of the best, most profitable small business ideas for entrepreneurs to pursue in 2025.

Science & Technology

5 AI Books Top Entrepreneurs Are Reading in a Rush for 2025

Entrepreneurs must embrace AI or risk falling behind. Discover 2025's top 5 AI books to gain a competitive edge, featuring insights from "The Wolf is at the Door" and a free AI Success Kit.

Growing a Business

AI Adoption Doesn't Have to Be Daunting Anymore — Here's How to Choose the Right AI Tools For Your Small Business

As 2025 begins, AI adoption may still feel daunting for many business owners — but it doesn't have to be. Here's how to pick the best AI tools for your needs and integrate them wisely into your existing systems.

Growing a Business

Want to Build a Digital Business? Here's the Framework You Need to Succeed.

The article emphasizes how ISO 20000-1 serves as a strategic tool for entrepreneurs to structure entirely digital businesses.