BuyInCoins via eBay offers the Wireless Alarm with Remote Control
with free shipping
. That's tied with our mention from last summer and the lowest total price we could find by a buck. The alarm is sensitive to vibration, shaking, striking, and moving and features a remote control distance of 66 feet. It requires a GF22 DC 9-volt battery (not included).
Expect this item to take two to three weeks to arrive.