Juve just have to be smart, when it comes to getting (German) players from Bundesliga.
Geis (21, Mainz) could be gettable for around 10-15m€ for example..or if u search for a LB, then I would advise u Baba (20, Augsburg) who would cost around 10m€.
Benfica for example is also highly active in Germany..they were close to sign Gerhardt (20) from Cologne..then they tried to get Selke (20) from Bremen and were also close. They were successful eventually, when signing Hany Mukthar from Hertha BSC Berlin for laughable 500.000€.
If u try for the Meyers, Werners, Brandts and Goretzkas, then u obviously wont be successful.