She has a progressed case of a RI (respiratory infection) and she will not get better without treatment. RI's can be deadly to your snake if not treated. Each veterinarian charges differently, you'll need to locate an exotics vet in your area and call them for pricing. I'll post up a couple of links to help you locate an EXOTICS vet (not a vet that primarily sees dogs and cats and very few exotics) in a moment.