718. Acts and conduct in sales and purchases.

In contracts of sale, or delivery of property pursuant to a contractual or other obligation, the following implications from acts and conduct may be made: (1) the purchaser of goods by the mere act of purchasing them is deemed to represent that he has the present intention of paying for them1; (2) he who assumes to sell property impliedly represents that it exists and has some value2; (3) he who delivers or hands over or produces documents in certain circumstances may be held impliedly to represent thereby that they are genuine3; and (4) the seller of an article presenting