These are available at Amazon for about $100 for the 3 sets. I included the Amazon UK links because I got them for $54 shipped to the US.
Not too shabby for 20 of the bands best albums on 12 discs total.
These are the original recordings, Not the tampered versions that Edgar Froese released in the late 90s early 2000s.
The remasters are very well done. not louder for the sake of being louder.
The Virgin Years: 1974-1978 [Box set, Original recording remastered] 3 discs
http://www.amazon.co.uk/dp/B004D5H2M2/?tag=imwan-21collects: Phaedra, Rubycon, Ricochet, Stratosfear, Cyclone
The Virgin Years: 1977-1983 [Box set]
http://www.amazon.co.uk/dp/B007DKNEI0/?tag=imwan-211977 - 1983 : 5CD set. Digitally remastered in 2012! Collects seven albums from 1977 to 1983, plus 4 rare BONUS tracks. Collects "Encore (1977) ; "Force Majeure" (1979) ; "Tangram" (1980) ; "Exit" (1981) ; "White Eagle" (1982) ; "Logos" (1982) and "Hype
Edgar Froese Solo (1974-1983) The Virgin Years [Box set]
http://www.amazon.co.uk/dp/B007JU5HSO/?tag=imwan-21 TANGERINE DREAM. 4CD set. Collects his five solo albums from 1974 to 1983, plus four rare BONUS tracks! Contains "Aqua" (1974) ; "Epsilon In Malaysian Pale" (1975) ; "Ages" (1977) ; "Stuntman" (1979) and "Pinnacles" (1983).