Upvote:-2
Like most other places across the world, they are called Starbucks ;) There are lots of them in Istanbul. There's one near Taksim Square
And another, close to you in Beylikdüzü.
Upvote:2
I think what you're looking for is Çekilmemiş Kahve. You should be able to find some in your local Migros. They have different types of Çekilmemiş Kahve, and the prices will be relatively cheaper than if you were to go to the Grand Bazaar.
If you're solely after Turkish coffee beans, you could try for çekilmemiş turk kahvesi from places like Kahve Dunyasi.
Upvote:2
As others say, the term is Kurukahveci. However many won't appear on Web searches. Just go to the Spice Bazaar and Grand Bazaar for the easiest options.
Upvote:4
I believe you are looking for "Kurukahveci" or "Kurukahvecisi", which is "seller of coffee beans or ground coffee" or "coffee store".
The most popular "Kurukahveci" is Kurukahveci Mehmet Efendi, which is pretty far (approx. 35 km) from the Beylikduzu zone in Istanbul, for coffee beans. It's just outside the spice market.