Almost every month, Cihan Citak gets into his car, passport in hand, and sets off from Istanbul to Alexandroupolis, a Greek seaside city 40 kilometers (25 miles) from the Turkish border. After a roughly four-hour drive, he walks the crowded aisles of the local supermarket, filling his cart with wine, cheese and other groceries that cost a fraction of what they do back home.

“The kind of olive oil they sell at €10 per liter, you can only buy at double the price” in Turkey, said Citak, the general manager of a food and beverages company, who says he mainly looks for high-quality products at better prices. “On average, my shopping costs one-third of what it would” at home.

Cross-border retail has become routine for many who found that Turkey’s surging food prices and stronger lira make Gree

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