I have been in the Greek islands for the last 2 months, alcohol is either comparable or cheaper (large beer 2.5 euros, wine 8 euros / liter), meat, much cheaper, fruit & veg more expensive. A giros pitta will cost you about 2.20 euros, a main meal in a restaurant about 8 euros. Diesel, 1.20 euros / liter.
Its worth checking the size of the beer BEFORE you order..