Hello guys, Im a besiktas fan from Istanbul so let me give some info.
First of all if he was playing at germany or any other euro country you would pay much much more. Euro has good value here so club needed this kind of money. We also earn lots from CL but still it was time to send him away. He is great player and also great person. He can do alot at premier league.
We bought him very cheap, he was 2nd option for most of his career at besiktas but he keeps improve improve. he started his football career at germany then come to turkey. He never gives up and always looks to improve himself he also have very good character which i cannot say for many other good players. This year he was amazing at CL, he will add more be sure about it. Everton is also good place for him so im happy for Cenk, he deserved to play on better leagues.