In the Puget Sound area, Denny's Pets in Kirklan has Red Crystal shrimps (not SSS, somewhere in the middle of the grading) in store. That's where we got ours. I think they were $7/shrimp.
When our sunny weather (hahaha) comes back I will be ordering a nice batch of yellow, velvet and SSS crystals! Until then lots of shirts and sweaters!