I realized that at the high end watch shops in vegas. A cheap watch store shows the prices, the high end don't. I bet you the sales people know you're not a buyer once you ask how much. The people who know just walk in and say I'll take one without even asking for cost.
I went in to a LV shop once (browsing) I shit you not a middle aged Arab woman with her daughters walked in, started pointing at different bags, cleared almost half of a top shelf and walked out leaving this guy who looked like a minder/driver settle the bill and carry all the bags.
She was in and out in less than two minutes, no price was discussed.