Hi Tomas,
As an ex-pat whose been living close to Kusadasi for the past 18 months, I'll try to give you my view. It certainly was a popular destination for Irish holidaymakers but that popularity has certainly diminished.
The winter weather is not that bad, you have at least blue skies and sunshine which is alot more than anyone has had back in Ireland this winter. The lack of a year round direct flight from Ireland is a big negative. There is direct scheduled flights now from London Gatwick with BA and in March, SunExpress are starting a direct service from Stansted. but this is still a struggle for Irish travellers
In the past 6-12 months, it's amazing how many English people have bought property here and further south towards Marmaris, even buying sites to build. A direct flight is a great help.
There is certainly nicer places in Turkey than Kusadasci. For example, Marmaris. Bodrum, Dalyan, Fethiye. Or Antalya and Alanya in the deep south. Antalya is way over priced and theres no value to be had there. The Russian mafia is buying up everything there. However, it does at least have direct flights from UK and the weather isn't bad even in the winter. Alanya has become popular with Irish buyers but it's a bit out of the way.But if it get's it's own airport, that could all change.
One thing that has happened here is that many Turkish people with seaside homes have been selling up in the past couple of years. Last summer (2006) prices dropped 30%. there is good value to be had if you have the contacts. In last Sundays newspaper, i saw a 3 story villa, 85% finished for sale for 40000 Lira (about 21600 Euro)
Overall Tomas, come over and have a look,don;t rush into anything. Why is this group selling up their property? Certainly set your sights at spending a lot less than 100K. Don;t pay off these guys a fat profit for an overpriced appartment. I know a couple of lads who bought last September, they paid between 55 and 60K. Probably got good enough value at that.
Good luck