A grim religious lecture kind of sucks the fun out of the topic, don't you agree?

I'm back from IST for a while now, and here's my observations on what works:

The bundling method worked. I got a better deal when I agreed to buy a few of whatever.
A couple of sellers haggled very weakly and gave it to me at my requested price almost right away.
I didn't use the walkaway method. Didn't need to.
The last few lira in the wallet method works. It really was my last few lira, so there was no choice.
The Grand Bazaar really had better money exchange rates than anywhere else, including outside in Beyazit. GB money exchangers have variable rates among them.
You may get better deals by going out of the central tourist area. I took a ferry to Kadikoy and headed to the Sali Pazari in Asia. The prices were better than in Sultanahmet.

After several days of looking at stuff and haggling, I made last day purchases at the GB for stuff I came for and hadn't bought. I found a few no haggle vendors that I liked dealing with. After shopping around I knew the prices, and realized they were giving me a good deal.

I am so eager to return to Istanbul and tour Anatolia.