You can come to Agia Marina:
Α. From the port of Pireus, with the boat "Agia Marina", which do not take cars, but only motorcycles. The schedules start from the first of June. Schedules
Β. With ferry boats which come from the port of Pireus to the port of Aegina and then you go to Agia Marina with public transportation.
"Ifigenia apartments" is 30 meters away from the bus stop, where the buses come from Aegina town. The bus stop is at the Afea Str., right on the main intersection. There you go right and down 30 meters.
If you come with the boat from Pireus, you go to Afea Str., walk left and at the main intersection you go left and right 30 meters.