Krasic and Matri are/were not bad moves, no matter what you say.
even then and very roughly, let's see:
Elia - bought 9 million, sold 5.5 million
Martinez - bought 12 millions, current value 1 million
Krasic - bought 15 million, sold 7 million
Matri - bought 18 million, current value 11 million
that's a loss of 3.5 + 11 + 8 + 7 = -29.5 Million Euros
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Barzagli current value = 12.5 million
Pirlo current value = 12 million
Pogba current value = 8 million
(
http://www.transfermarkt.de/de/juventus-turin/startseite/verein_506.html)
Llorente current value = 25 million
(
http://www.transfermarkt.de/de/fernando-llorente/profil/spieler_35564.html)
'profit' of 12.5 + 12 + 8 + 25 = +57.5 Million Euros