Use "Order by Catalog Item #" and enter item #869351-Z6
Free shipping is w/rewards membership (also gives 5% cash back on all purchases)
Note: Only one can be purchased at this price.
However, you can place multiple orders to get around that obstacle.
Also of note: Each order I placed came up with a .50 coupon making it only $3.49 shipped. I'm uncertain whether that will be true for everyone.