Amazon offers the Olay Professional Pro-X Replacement Brush Head 2-Pack for $1.74 with free shipping via the directions below. That's tied with our mention from last summer and the lowest total price we've seen. (It's also a current price low by $10.) To get this deal:
  1. View the Olay Professional Pro-X Replacement Brush Head 2-Pack for $4.99
  2. clip to $3 off coupon on the product page to cut it to $1.99
  3. add it to your cart via Subscribe & Save for a final checkout price of $1.74
Note: Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.