it's 10€ for 8 tracks. why? and what about all the other tracks that have been added to the game since launch? why not bundle all of those instead to buy in addition to the OST? or even better, make it a free update for the OST?
You can find all previous Chapter soundtracks as well as "Music of Tamriel" (a collection of Imperial City, Orsinium, Thieves Guild, Dark Brotherhood, Clockwork City and some Base Game music) on Spotify as well. Currently there aren't any official soundtrack releases for Murkmire, Markarth, Deadlands and Firesong DLC updates though.