I have several friends selling at the moment, from experience I would say that anybody selling, then one to use is Agence Melusine, he seems to get good prices.  100% is quite good and they are in conjunction with several agencies in the UK.  For self advertising, then Greenacres has had some good sales results.  But having spoken to a few estate agents they have said the market is flat and prices have dropped nearly 30% and that they expect houses that are priced realistically to probably hang around for upto a year.