Try to avoid buying from USA for such low costs, it is not worth it. You will pay much more for shipping costs, import/custom fees etc. Instead, try to buy from EU/UK/Switzerland if possible to avoid import fees etc. Also shipping should be lower. You can check ebay uk, de, fr, it etc... Even if the seller doesn't write shipping to Greece, you can still write to them and ask them about the lowest cost with tracking number. Some might still accept that.