Off the top of my head I think it was about 15-20 Euros maximum each way, but it could have been a lot less (its been a year so the grey cells are starting to forget). The main problem we had was finding a driver who was willing to take us such a short distance. After they have waited in line for perhaps three or four hours they were not best pleased at having such a short fare, but what could we do.
There are though other hotels that do have a free shuttle bus, so it might be worth paying a little bit more and staying in one of those, or like Andy did, hire a car.
...love is just a camouflage for what resembles rage again...