You can buy one direct from the makers here for $219.99..or from a 3rd party seller, like Thomann, who have it listed at €279 (including Free shipping).
I checked out a few videos on YT and at first it looked a little "gimmicky"..but after a few minutes you get to see it enables you to do some pretty neat things..either live or in the studio. Yet anothet toy to add to the list.
some of the most masterful and soothing jazz i've heard in a while. listen to the entire album; it's fucking fantastic!
For future reference, when posting / sharing Youtube videos..you can either post a link like you did here, but before you post it delete the "s" from the "https"..that will result in a large version of the video being posted.
Alternatively, use the Youtube tags and just paste in the letters and/or numbers that come after "=" in the video URL in the space between the tags (..click on "quote" under any of the posts above with a small video in and you'll see how what I mean)..that results in a small video format being posted, like you see in many of the posts in this thread.