Gillette M3Power Replacement Cartridges, 8-Pack or $14.25. Here is a screenshot for your reference. Shipping is free on orders over $25. A possible option is to get two to qualify for free shipping. If you spend more than $59 or more on Gillette, Old Spice, and Zest products, use code JUNE9GIL to get $10 off. This is for the Gillette M3Power razor and features spring-mounted blades in a box of 8 replacement cartridges. Most places have it for about $19.
Originally posted earlier, this deal has been revised.