Amazon offers its Amazon Prime members the BEAMii Lock Light in Brown, model no. 202, for $11.64 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.26.) That's pennies under our mention from two weeks ago and the lowest total price we could find for any color by $11. It features a touch sensor, automatic shutoff, water resistance, and temporary or permanent mounting.
Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)