Dorco offers its Dorco Pace 6 Plus Razor Refill Cartridges 16-Pack for $34.74. Coupon code "50OFF6PLUS" cuts it to $17.37. With free shipping, that's a savings of $17 and the lowest price we could find, although we saw them for a buck less in January. Each cartridge features six blades and a trim blade. Note that a system handle is not included.