Ebay, aquabid, local pet stores, Petshrimp.com.... all excellent choices. Petshrimp.com actually sells their shrimp on aquabid as well. What do u want the shrimp for? Cherry shrimp are tiny but the females are bright red and they will beed. But you cannot keep them with fish. Ghosty shrimp are difficult to see and don't live long, and again, become food for many fish. Amano shrimp work best for me in a fish + shrimp situation. I've had a colony of amanos for years now in with all my fish. They grow to about 2" long and eat algae.