ThinkGeek offers the Annoy-a-Tron
, model no. 98C52, for $4.99
with free shipping
. That's $3 under the per-unit price of our June mention and the lowest total price we've ever seen. (It's a current price low by $5.) The Annoy-A-Tron emits a loud beep in varying intervals and features a magnet for hiding.