That's a pretty good price. I've only seen them for $2.99 around here. They're same as crystal red shrimps, but different from cherry shrimp. So won't interbreed with RCS but will with CRS. 
I personally haven't found them any harder than cherry shrimps, especially if they're from LFS. Much hardier than CRS, trust me.
I personally haven't found them any harder than cherry shrimps, especially if they're from LFS. Much hardier than CRS, trust me.