Dear Bob
Unfotunatly Greece is not much in techology of communications, thats why probably you wont find many information about such things online..
I sugest RE/MAX agent, which website you can find at www.remax.com, and they will give you some information about their offices in Greece (they do exsist).
Another way is to find a lawyer from your country, to contact with a Greek lawyer.
Third way, is to recive the special weekly newspaper with adds. It won't be difficult to send you by post, but you have to know Greek to read it :-)
Hope you 'll find a way. I'll be glad to help you further.