Every major holiday they go on sale.If you can find one of these for that price, buy two! I've got a couple and paid double that for each one and thought they were well worth the money. Motion activated, small enough for my Scorpion and holds zero. I think mine takes the CR 2032 battery you can find at any Dollar General.
Bigred, where did you find such sorcery? At the bottom of a lake next to King Arthur's sword? Do I just need to practice Google-Fu? It HAS been a while.