i got my first pistol from an hour away LFS for 30 fricken bucks and it was fine in my tank for like 2 weeks then disapeared.. so i picked up another randalli pistol shrimp and 10 nassarius for $26 (there was a huge sale!
) from a closer LFS.
had the second shrimp for about 2, 3 maybe a month and he disapeared.
then all of a sudden one day my goby had a hole, so while looking at it a pistol shrimp comes buzzing on out with a shell in his hand.. i was soooo happy and not to mention i just had to move a clump of GSP and they were right up front..they are by far the coolest ever, when a snail gets near the hole the shrimp will either snap his claws or roll it out of the hole and away..
then it was either last night or tonight ( my days are screwed up because i work night shifts ) i spotted a pistol shrimp on the other side of the tank.. im pretty sure they wouldnt roam that far so i think it was the other one!! super happy about that too.
so if your looking for a pistol shrimp go for it, the randalli guys are smaller and i hear its common they get "lost" in bigger tanks, so there is also tiger pistol shrimp to consider