Amazon offers the Gillette Fusion Men's ProGlide Manual Razor Blade Refill 8-Pack for $12.88 with free shipping via the directions below. That's a buck less than our May mention and the lowest total price we've seen. (It's a current low by $12.).

To get this deal:
Step 01: View the Gillette Fusion Men's ProGlide Manual Razor Blade Refill 8-Pack for $18.88
Step 02: Clip the $6 off coupon on the product page
Step 03: Add it to your cart via Subscribe & Save for a final checkout price of $12.88 with free shipping

Note: Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.