Auctioneers had hoped skeleton of dryosaurus would fetch half a million dollars . Bids did n't come up , so the skeleton from Cretaceous Period went unsold . Skull of a teenage woolly mammoth sold for close to $ 500 at auction . Huge opalized fossil of an extinct sea creature went for almost $ 50,000 .
Auctioneers had hoped remains of dryosaurus would fetch half a million dollars . Bids did n't measure up , so 9-foot skeleton from Jurassic Period remains unsold . Fossil of a teenage woolly mammoth sold for close to $ 60,000 at auction . Huge opalized fossil of an extinct sea creature went for almost $ 50,000 .