The news entry is possible thankfully to Samanosuke.
The DVD and the Blu-ray version of the K-20 will be released in June 24th this year.
So far the price that shinseido.co.jp gives for DVD is ¥3,990 and for the blu-ray cost paroxysms ¥5,040
Plus, according to Samanosuke Editions include the special edition and the standard edition. Usually, YesAsia releases the all-region, English subbed version the same day.