Amazon offers the Gillette Fusion Men's ProGlide Manual Razor Blade Refill 8-Pack for $18.22 with free shipping via the directions below. That's the lowest total price we could find by $3, although we saw it for $5 less in October. To get this deal:

1. View the Gillette Fusion Men's ProGlide Manual Razor Blade Refill 8-Pack for $25.49
2. clip the $6 off coupon on the product page
3. add it to your cart via Subscribe & Save for a final checkout price of $18.22 with free shipping