I'd trade in at least three stegosauruses and a brontosaurus. Maybe even throw in a T-Rex. Heck they can have a herd if they want.
Can dinosaurs be used as currency? Because I'm willing to barter. Technically I've negortiated with dinosaurs before. More like dinosaur people, actually. But still. Scales and all. Spock would probably say that's offensive but it's not my fault they're dinosaur people and he's not even here.