Small Craft Knife with Six Blades is only $10 and ships (USA) free!  Easy to change blades, just twist the locking ring. Includes 6 blades plus the handle.  This is a small knife, only about 4 inches long, but that keeps you spry and easily able to out-maneuver the competition.  What’s that mean?  Jack Squat.  Nice little razor knife though.