Bear in mind that the price might go a whole lot lower if/when Greece crashes out.
That aside, I think there is a huge opportunity here - if you are buying something as a vacation/tourist rental, AND you can market it directly to North European or North American tourists, even if on a small scale, AND you have somebody trusted who can manage it for you on the Greek end. I spend a lot of time in Catalunya and everywhere I look I see ultra-prime property, which in the USA would be worth millions, sitting abandoned or barely utilized. In these Med countries there just isn't any shortage of beach space or great views or condos in quaint oceanfront towns. Rental yields are generally quite low and competing on price for budget tourists on Booking.com isn't a route to good returns.
However, if you can work out the local connections, I think it'd be a great business idea to pick up a bunch of properties on the cheap, upgrade them to luxury standard and market them as "exclusive" high-end rentals to wealthy residents of NY, SF, DC, or London etc.