Rhodes? I just booked a week at end of october for £600 pp all inclusive. Its school holidays so more expensive you should be able to get something much cheaper if you go becore 27 oct.
Crete is nice this time of year...have a look around Elounda
Crete is a good (and fairly cheap) bet at this time of year but better weather on the south coast, it's protected by the White Mountains from crappy weather coming from the north