The entire series of True Blood, Season 1 through 7 are available already for pre-order on Blu-Ray and DVD on Amazon.com. Get on over to reserve your copy to save for all time.
These listings are prior to the official HBO Home Video announcement for the title, though, so instead of a street date Amazon only says “This title has not yet been released. You may pre-order it now and we will deliver it to you when it arrives.“
Pricing is available, however, currently showing $249.99 SRP for the standard DVD and $299.98 SRP for the Blu-ray set (you can, of course, guarantee your copy right away at a discounted price, if you order it using either of the links below).