According to a news release from Bonhams auction house, The Montana Dueling Dinosaurs & Distinguished Fossils collection is heading to the auction block on November 19.  The Associated Press reports that the fossils were found on a Montana ranch in 2006.

The Montana Dueling Dinosaurs are a Nanotyrannus and ceratopsian which paleontologists believe passed away together during an ancient death match. The auction house calls the the Dueling Dinosaurs “one of the most important North American fossils” ever found. Their skeletons could offer pioneering information about life on Earth during the Cretaceous period.

In addition to the Dueling Dinosaurs, the auction house also plans on placing several other Cretaceous dinosaurs discovered in the Treasure State on the auction block, including a 38-foot-long T-rex. The T-rex utilized its huge head, serrated teeth, sensitive smell and amazing color vision to become the top predator of the late Cretaceous period.

Bonhams auction house will also offer a Triceratops skeleton. Triceratops’ three horns helped protect it from its enemies, but may also have been used to dig up large prehistoric plants.

In addition to a T-rex and Triceratops, Bonhams will also place several fully-mounted skeletons from strange Cretaceous period dinosaur species, including a Thescelosaurus, a Hypacrosaurus, and a young Tenontosaurus.

Bonhams will also offer partial remains from a number of interesting prehistoric creatures, including a humongous 12-foot Canadian blue mammoth tusk weighing in at 285 pounds from the Pleistocene period.

Fossils from ancient marine creatures will also be placed on the auction block, including a big megalodon jaw reconstruction with a complete set of original fossil teeth from South Carolina measuring more than nine feet across and eight feet tall.

According to Reuters, the price for the Dueling Dinosaurs could set a record at the fossil auction. The North American fossils are estimated to fetch anywhere between $7 and $9 million. A Tyrannosaurs Rex skeleton named Sue is the current record holder for most expensive dinosaur fossil purchased at auction. Sue sold for $8.3 million in 1997.

“The November 19 auction contains nearly 80 lots, including several of the finest, most important fossils ever to come on the market,” noted Thomas Lindgren, Bonhams Co-Consulting Director of Natural History, in a statement. “Led by the unsurpassed Montana Dueling Dinosaurs, this auction is a once in a lifetime opportunity for institutions and collectors.”

However, LiveScience notes that the sale of the Dueling Dinosaurs may destroy their value to science. The science website points out that even legally obtained fossils are sometimes ignored by paleontologists when they’re placed on the auction block for big money.

Would you pay millions of dollars for a set of dinosaur fossils? Will the Dueling Dinosaurs become the most expensive dinosaur fossils ever sold at auction? Start conversation by sharing your thoughts and predictions in the comments section.