LOL i like the :
PROP "DOOMSDAY DEVICE"

Evil On A Budget, Inc. presents the prop "Doomsday Device," guaranteed to soil the knickers of your "heroic" adversaries. Actually a plastic box filled with cheap electronics, the device makes ominous "whoop whoop" sounds when activated, and a sinister female voice counts down from 100. Just press the "deactivate" button when the craven idiots give in to your demands. I mean, who's going to call your bluff on something called a "Doomsday Device?"

Price: US$99.99
*requires 2 AA batteries, not included
put me down for 2