As a paleontologist with a keen interest in the commercial aspects of fossil sales, I can provide some insights into the value of a T. rex fossil. The worth of such a fossil is determined by a variety of factors, including completeness, preservation, and rarity.

When we look at the historical sales of T. rex fossils, we can see a significant range in prices. The most notable example, as you mentioned, is the sale of "Sue," the most complete T. rex skeleton ever found. This specimen was sold at an auction for over $8 million dollars on August 18, 2009. This price tag is not only a testament to the rarity and completeness of the specimen but also to the intense competition among collectors and museums who were vying for this unique piece of natural history.

However, it's important to note that not all T. rex fossils command such high prices. The value of a fossil can be influenced by several other factors:


1. Completeness: A more complete skeleton will naturally be more valuable than a fragmentary one. Sue's skeleton was about 90% complete, which is extremely rare in the world of paleontology.


2. Preservation: The condition of the bones can greatly affect the price. Fossils with minimal damage and clear details are more desirable.


3. Rarity: Certain parts of the T. rex, such as the skull or the lower jaw, are rarer and thus more valuable.


4. Provenience: The history and origin of the fossil can also play a role. Fossils that have been legally obtained and have a clear chain of ownership are more likely to fetch a higher price.


5. Scientific Significance: If the fossil provides new insights into the species or its environment, it can be of great scientific value, which can also increase its market value.


6. Market Demand: The value of any collectible is influenced by the demand in the market. The interest of collectors and institutions can drive up the price.

7.
Legal and Ethical Considerations: The legality of the sale and the ethical considerations surrounding the excavation and sale of fossils can also impact the price. Fossils that have been excavated and sold in accordance with international laws and ethical guidelines are more likely to be accepted by the scientific community and collectors.

It's also worth mentioning that the sale of fossils, especially those of significant scientific value, is often regulated. Some countries have strict laws regarding the export and sale of fossils, which can affect the availability and price of such specimens on the market.

In conclusion, the value of a T. rex fossil can vary greatly depending on a multitude of factors. While the sale of Sue set a high benchmark, it is not representative of all T. rex fossils. The market for such fossils is complex and influenced by a range of scientific, legal, and commercial considerations.

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The last time a T. rex was auctioned, the most complete specimen ever found, known as Sue, went for more than $8 million dollars.Aug 18, 2009read more >>