Most vets will charge $55-80 for exotics, just for the visit. Baytril injections are generally $4-6 each, and will probably prescribe 8-10 shots depending on how bad the RI is.
My vet just sells me a vial of baytril at a time and a box of sharps. ONce you get a good relationship with your vet, he'll let you buy what you need and treat your own animals to save money. Pay attention to what they say, and get involved with the treatment, help them treat your herp, and most times they will help you out. I have two vets that I use, both trust me to treat my own animals, of course knowing that I will call or bring it in if/when it gets too over the top.
Chances are, your local herp shop/reptile expert will know and help you out also... Never hurts to ask!