every month, luvmypet brings it's mobile clinic to my local petco. they visit sites all across the US. during the month of february, they are having a special. you can get up to 5 pets vaccinated for rabies for 5.00/pet.
also, they offer other vaccine packages and if you choose one that includes rabies, you'll get 5.00 off the package.
here's the link to luvmypet if you want to read about them and find the closest clinic near you:
Pet Vaccinations: Dog Vaccines, Cat Vaccines at Luv My Pet - Petco
please note, i am not affiliated with these places and have never used their services so i really can't answer any questions about them.....just wanted to pass this on in case anybody was interested!
