So , over 10$ bn for 20 planes. 2.6 bn£ to train 40 pilots and lets say 400 crew????? I think that this dead will cost Turkey, together with second hand planes, well over 20bn . I  f hope at least that for " training" they will use British airframes. If they use Turkish , it basicaly means 19 airframes. Probably, , they will use Omani airframes. 
I hope that Turkiye avoids buying, even f needle from these B. 
Oh that support? What spare parts does it include? I hope not , just some spanners. 
Necessary but horrible horrible deal