I just got back from two weeks on the Turkish Mediterranean coast between Antalya and Fethiye. Prices were not meaningfully depressed for hotels and restaurants. Where prices were lower, it had more to do with the declining Turkish lira rather than the political situation.

The first week I was there, the place was completely deserted. But, once schools let out, Turkish travellers filled the coast, and everything was quite busy. I saw only a small number of international visitors.

You'll probably find lodging deals at the big online European travel consolidators like Thomas Cook and TUI.