Home Depot offers the Lathem Keyless Entry Security Interior Door Lock
in Right (pictured), model no. LX100-R, or Left
, model no. LX100-L, for $98.45. Coupon code "CMHD2012" trims it to $93.45
. With free shipping
, it's an $86 drop and the lowest total price we could find for a key fob-based interior door lock. Sales tax is added where applicable. It's powered by four “AA” alkaline batteries (not included) and includes five 2" x 3.5" badges. Deal ends December 31.