Enter through the Beyazıt Gate, not the Nuruosmaniye Gate where tour groups crowd together, and first explain how the Ottoman market has operated for 600 years through its trade-specific streets
2-hour guide helps you understand the "real carpets, real copperware, real Iznik, real lamp makers" in the Grand Bazaar
Carpet/copperware/Iznik/lamp maker appraisal mini-class, enter an old shop to drink apple tea/black tea, the guide teaches "browse first then counter, use cash to push the price down, smile and walk away"