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by perl4ever 3075 days ago
In order to make a trade, what you are getting must be more valuable to you than what you pay - isn't that axiomatic? If you are willing to trade $2 for a Coke, then the Coke must be worth more to you, and therefore it follows $2 is not your maximum price. Your maximum price is at least $2 + epsilon.

Since it is impossible to make a completely one-sided trade, one may ask how one-sided is acceptable, and if perhaps the optimal situation is where it is balanced in favor of the consumer...