Sterling was a big fave when I went x2 years ago, they loved the stuff. USD are good anywhere.
I really hated the country, people constantly bombarding you with buy this, get this, do this and etc. More importantly (and without trying to come off racist) the men were just incredibly rude toward my girlfriend at the time, constantly telling her how big her boobs were and other not very tasteful stuff, while I was stood next to her!
Edit
The location was Marmaris and Bodrum same as the post below..
Bodrum and Marmaris.. Went there in 99 when the missus and I were skint, cos we'd just put down a deposit on a new place. Cheapest holiday FOR A REASON.
Every other shop is a jeweler (selling low grade mostly crap) or leather shop. The men lear over your woman, hang out in groups.
I will NEVER return.