Sorry, Guys, posted original text on wrong forum.
Have been looking on the Blue Star web site and I see that from 1st April they are doing Super Economy Fares for Cyclades for destinations from Pireaus (20 euros each way). . It states you cannot book on-line so I called direct to book only to be told these fares do not exist. Emailed the information desk and got a very 'curt' one liner back saying 'There are are no Super Economy Fares!!. Even though I questioned the fact that it states this on their web-site, I do not seem to be gettting anywhere with this one. Has anyone got any theories regarding this mystery, or similar experiences. Thanks.