I tend to research or have some knowledge of what I want to buy when I go into a store, so if I must ask anything its "can you unlock/check to see if you still have XYZ?" But I've never been one to ask a zillion questions.
Woman came in the other day to drop $500 plus on a bedroom TV, didn't know what 1080p or 4K was, didn't know what size she wanted, didn't know what brand...I was flabbergasted people can shop so foolishly. And she was solely reliant on me for my experience. She was lucky I actually know things about TVs, it was literally my first ever shift of electronics...
^ I don't shop like that, and that's why my TV actuall fits in my bedroom.