How to Haggle without Being a Jerk

Everyone knows how to haggle, right? It’s like war, but fought with currency. You barrel into a store, in Istanbul’s Grand Bazaar, say; sneer at the vendor’s opening gambit; riposte with something like 5% of that figure; parry all of the weak and transparent “finest quality,” “local price,” and “family of eight” haymakers; slowly but surely batter your enemy into submission; and finally emerge, exhausted but victorious, with a m…