In a store or on a forum? In the classifieds <maybe here, not sure> and on the sister site, www.aquariacentral.com, they typically go for a dollar a piece plus shipping. In stores, usually a good bit more. Usually when having them shipped, they are juveniles while in stores they are adults. Most of the shrimp found in stores as well are females as they are more vibrant in color.
Its actually RCS, Red Cherry Shrimp. CRS are Crystal Red Shrimp, a caridina species derived from bee shrimp that are graded and considerably more expensive.
I can get 20 shrimp for $30 shipped priority. But I think I want to get mine from MsJinkzd if she will let me, I hear all her shrimp/snails/plants ROCK some serious SOCKS man!