When we stayed at the Delta last year the buffet breakfast at Bella Mama's was included in our stay.
If it is 10tl I would say it was good value for money, it was the normal salad, hard boiled eggs and the usual meats they also had some lovely fresh brown bread that you could toast, I love the Turkish bread but the brown did make a nice change. The tea and coffee was unlimited and there was also jugs of chilled juice I would defo pay 10tl for this brekky