Make sure the company is actually doing the removal themselves, so you know who you are dealing with and they are not just an "agent", subcontracting the work out to random Greek / Albanian / Macedonian trucking companies. I think all three of the companies holycrappamolie mentioned are like this - they don't actually send any trucks to Greece themselves, they just use "agents".

If they advertise in the Athens News then at least they are probably doing the work themselves all the way to and from Greece. Make sure they are registered removal companies though, not just a guy with a truck.

I would recommend a registered company like , at least they are registered removal companies with proper insurance and they actually do send their own removal trucks to and from Greece. They might be slightly more expensive but you get what you pay for.