Card Show Etiquette ? what would you do.

[Snapolit1]

I think it would be poor form to stick your nose into the middle of someone's discussion with a dealer, but beyond that I'd have no qualms asking to see what someone has. And I wouldn't be hiding in a hallway or bathroom to do it. My experience is that very few dealers at shows are there to do heavy duty buying. Might be there for a purchase or two, but most of them are there to raise cash, not hand it over to someone else.