In the souks or medinas you NEVER take the first offer, and if he continues to insist on that offer with no meaningful movement to what you are looking for (unless you exude the ignorant American tourist look) YES that’s exactly what you do, you start walking away! Walking away shaking you head and looking equal amounts of mildly annoyed and disappointed saying “halas” is in fact an essential part of the process. At that point the vender runs after you saying “my friend, my friend, come, come we talk more, better price for you we come to....inshallah, yalla yalla habibi”. If you bring a team of negotiators and attorneys with you he will close up shop and won’t speak to you.

Honest Answer, and I agree very germane to the current TA.