That is ridiculous. I'd write that vet a very nice, straight forward letter and let her know that she / he will not be getting any more of your business nor will you encourage any of your NUMEROUS reptile keeping friends to visit that clinic due to the outrageous nature of the billing.
as an edit. I would also like to let anyone in the Colorado springs area know that i took one of my pets to the Dublin Animal Hospital and got an exam, and wonderful care for a fairly decent price.