I see this enough, ususally Ingame, to wonder what the NPC could say?
When you go to starbucks, the store, or whatever, and they tell you what you owe, do you sit there and keep saying you really want the item, or do you pay for it?
I must be misunderstanding something. Maybe people are trying to negotiate the price down?
Me: I want a hamburger.
Clerk: that will be 2 dollars and 43 cents.
Me: /give clerk 2 dollars and 43 cents. (note, actually give, donot just pretend to give!)
Clerk: here you go.
Bamko has recieved a hamburger.