Amazon offers its Prime members preorders of Legend of Korra: Book Two Spirits on Blu-ray Disc
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $3.98.) Outside of the deal below, that's the lowest total price we could find by $7. It has a release date of July 1.
A close price: Best Buy
has it for $19.99 plus $2.99 for shipping. (Orders of $35 or more qualify for free shipping.)