It may be of use to some British based buyers to be able to test the High St (or High Cad) prices. I would suggest this thread could be used to share Turkish Web sites that may be of use. People can then save them if they are of use.
I will kick off with one that I have just given elsewhere, for Beko - which has the sister company Arcelik - that has all its stock + prices. It also does, if I remember correctly, Eng Lang translations to some of its Operating manuals.
http://www.beko.com.tr/en/urunler.phpAnother is Migros (Kangurum) which although it is not in English, it does allow reasonable price checking. They also do Home Delivery. Part of their main site is in English but when you get into the shopping, it is Turkish
http://www.kangurum.com.tr/kangurum2-web/main.do?locale=tr_TR