For Prime members only, Amazon offers the Gillette Fusion Manual Razor Cartridge 4-Pack for $12.44. Clip the $4 off coupon on the page to drop it to $8.44. Plus, free shipping applies. That's the lowest price we could find by $3. They each feature four blades and an indicator lubrication strip.
Amazon again offers the Gillette Women's Venus Razor 3-Pack in Tropical for $3.64 with free shipping, via the steps below. That's at least $3 less than you'd spend at a local retail store. To get this deal: