Today only, until 9 pm ET (or 100% claimed), Amazon offers its Prime members the Olay Professional Pro-X Advanced Cleansing System
with free shipping
. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $4.98.) That's $3 under our April mention and the lowest total price we could find by $7. This brush has a 2-speed rotating head and requires two AA batteries (included).
Amazon Prime membership is $79 per year or $7.99 per month; however, Prime is free for college students for six months, and free for parents and caregivers for three months.