As far as I can tell, it does not include the springs. I also think that they are the OE fit bilsteins that have been modified for 2.5" spring use, and then custom valved. But I am just guessing based on what I see in the picture. Particularly, the mounting tabs look just like the ones that I have.
My concern with this setup, is that the struts are fairly long and you're paying a bit of money to still have limited travel.
I agree, it's still a good deal at that price. A new Bilstein strut, adjuster sleeve and custom valving are worth that asking price, IMO.
I did find a post from 2011 from a user on another forum that had them. I sent him a PM, but no response yet.