regarding a man who has a commodity and marks it for sale at a certain price; he would sell it to any silent buyer for the marked price, but he would make a better offer for the bargainer: 'If he were to make a better offer for two or three men, it would not be a problem; but if he does that for everyone who bargains with him and not for non-bargainers, his deed would not appeal to me, unless he sells it all in one deal.'