As one of its daily deals, THAT Daily Deal offers Cell Lock-Up: The Prison for Cell Phones for $11.99 with free shipping. That's the lowest total price we could find by $9 (outside of the price below), although we saw it for a buck less in September. It can incarcerate six cell phones for up to 60 minutes; if a phone escapes before the settable timer is up, an alarm sounds. Although two AAA batteries are included, you'll need to provide your own inmates. Deal ends October 22.

A close price. : Galactica via Amazon has it for $12.54 with free shipping for Prime members.