Talk about a real monster sale! A rare skeleton of a Triceratops that's 65 million years old went up for auction.
The 7.5m-long skeleton was only the second dinosaur of its size to be sold and had attracted lots of attention.
But would-be buyers at the auction in Paris, France, failed to cough up the minimum 490,000 Euros (£400,000) that was wanted for the dinosaur.
So the three-horned skeleton is still looking for a new buyer, if you've got a lot of cash to spare!
The skeleton, which was dug up in a remote area of North Dakota, in America, in 2004, is a mud-brown colour and 70% complete.
Dinosaurs lived about 230 million years ago
There were more than 700 different types of dinosaur
The word dinosaur means "terrible lizard" in Greek
The plant-loving Triceraptops were one of the last types of dinosaur to become extinct.
The last time a complete dinosaur went on sale was in October 1997 when a Tyrannosaurus Rex called Sue was sold to an American museum for $8.3 million (£4.2m).
The dinosaur is the star lot of the auction that features 150 other pieces including fossils, meteors and minerals, some dating back 450 million years.
The skeleton had been owned by a private collector, who had it on display in his own private museum set up in his huge reception hall of a castle in Europe.