In January my classmate bought a rabbit for $20. And thought it was a good deal/price. (I have no idea where she got it)
 
It changes from store to store and person to person. It also depends on the age, breed, and gender of the rabbit. One petshop could sell it for $20 another for $15, and another for $30. One person could give a rabbit away for free and another could ask for $50. 
 
You need to do a little research. Check your local pet shops. Check the Classifieds in the newspaper. Ask a vet. Check your local Humane Society. Look on the internet for breeders, and rescue groups. Check www.petfinder.com .
 
You need to figure out what breed you want and your price range.