Check Paymill. They have a pretty good integration and are one of the strongest players in the market. They claim that they support Turkey too, but since I am located somewhere else I cannot check that. Otherwise they are cool
Good luck
Despite not (currently) being ideal, allowing users to pay in bitcoin would be pretty neat.
PayPal?!
PayPal's commission too high and integration was not simple as Stripe, Braintree. If only option is PayPal; i can get a vpos from a bank and its much easier plus lower commissions