> That would invalidate all of commerce if true. no it wouldn't. It the deal was fair - aka, fair value - then both the buyer and seller feel they got a good

> That would invalidate all of commerce if true. no it wouldn't. It the deal was fair - aka, fair value - then both the buyer and seller feel they got a good exchange. A good deal implies that the buyer got more value out of the exchange. This sometimes can happen, because the seller is valuing the sale for more than just purely cash in exchange (for example, wanting to free up inventory space).