Unit costs may vary by market; but professional quality alone is not limited to geography. The right question for a brand that wants to work in Ankara is the scope of the proposal before the designer's price.
For a small business, the logo and basic identity manual may be sufficient; if a scaled brand requires a corporate identity system along with equipment, presentation and usage templates, so the same number does not produce the same value on different projects.
Understanding the regional difference for corporate identity studies; it makes the budget close to reality, as well as meets the expectations of delivery correctly.