The buyer needs to also be fair and honest while not only expecting a seller to meet his demands when posing questions of the seller. As you noted, not all sellers are aware of quantity available -- such as there being either none or very little... and when a buyer asks such questions of a seller, he, too needs to be honest... Such as being prepared to answer a seller's question when the buyer asks: "How many of these chips do you have or do you know of others?" when the seller asks, "Why, is there something I do not know about this chip, is it rare -- and they're worth much more than what I'm asking?"

Buyers can be just as dishonest as sellers especially when working in groups... it's not a one way street...