I travel to Greece once or twice a year. I have some friends who have some businesses in Corfu and as well as visiting them I travel to other islands.
Prices for the essentials (beer, wine, Greek Meze for two, etc.) have remained more or less stable in Euros for some time, certainly over the past two or three years. Of course, you get far fewer Euros for your Pound today than you did three years ago (about 1.15 compared to about 1.40) so prices in Sterling equivalent have risen by about 20% in that time.
There has been little change in prices in Greece (certainly for the items that tourists are likely to spend their money on) since the Greek financial crisis in the summer. Indeed, if anything, those involved in tourist dependant businesses have tried to keep their prices down to attract as much business as possible.
The Greeks’ economic problems demonstrate perfectly why the Euro is totally unsuitable for such a widely diverse range of economies across Europe. Before they adopted the Euro the Greeks were able to adjust the value of the Drachma to attract foreign trade. Now they are tied to a currency which has risen in value quite sharply (certainly way beyond the level of economic growth they have experienced) and their customers (the tourists) are looking elsewhere for better value.