Discovery Planet Earth Blu-ray Disc Set for $24.99.  Add this filler for $3.99 to apply promo code DCSEML to receive $5 off $25.  Shipping is $4.00, so the total comes to $27.98 shipped.  Make sure there is no extra space before and after the coupon code while entering for it to work.  Here is a screenshot for reference.  Note this is the U.S. version narrated by Sigourney Weaver.  It includes 11 episodes and bonus materials.