Where to buy iPhone 3GS in Thessaloniki

[acim]

I am at summer vacation in Nea Potidea and I would like to buy iPhone 3GS here in Greece because it seems to be cheaper than in Serbia and SIM free. Please let me know where to find good (with good prices and warranty) GSM phone shop in Thessaloniki.

 

[acim]

Just if someone else is wondering about this, the answer is Cosmos shoping mall, shops Public and Germanos. I bought mine in Germanos.