Really asking for exact equal value to an exchange is in itself isn't just /a/ fallacy but an entire stack of them. It implicitly assumes a universal equal valu

Really asking for exact equal value to an exchange is in itself isn't just /a/ fallacy but an entire stack of them. It implicitly assumes a universal equal value when the utility and demand differ greatly based upon circumstances including marginal utility. One pair of boots is worth more to someone without them than someone who has eight comparable ones. Even if such exact trades could be found there is no incentive to provide them without it functioning as a loss leader of some sort.