If you look on the net,you will find that,Migros,Tansas,Carrefour,etc show there promotion campaign prices.There are also their subsideries,ie Sok,their price diferentials will give you the average differences found in the shops themselves.Genpa is also very good,but not found in Fethiye yet,You can pretty much plan your shopping at home and just do a round robin once a week.That is if you or the wife like to use the net this way.Good luck