This place says it's $125 for kittens and $100 for adults. Extra for declawed or purebred cats. Fee includes health exam, spay/neutering, parasite/flea treatment, vaccinations, and microchipping. The price seems to be similar for all the animal shelters in my area though. It might vary state to state.
Adopt | Take Me Home Pet Rescue
This particular animal shelter requires 2 references that are not family. I'm not sure if that's common for animal shelters, but something to prepare for just in case. If you rent a home, they require proof of permission to have a pet by the landlord. And I believe there's an age restriction of 21.
I'm thinking about getting a cat myself. But I would have to take another step and take some sort of antihistamine/anti-allergy medication to do so...
Good luck!