Robert Louis Stevenson offered an interesting paradox in which you are offered to buy, for whatever price you wish, a bottle containing a genie who will fulfill your every desire. However, there is a catch... The bottle must be resold for a price smaller than what you paid for it, or you will have bad things done to you for eternity.

Obviously, it would be a bad idea to buy it for 1¢, because you would have to give the bottle away, but no one would accept the bottle knowing that he would be unable to get rid of it. Likewise, it would be a bad idea to buy it for 2¢, and so on. However, at some reasonably large amount, it will always be possible to find the next buyer, thus the bottle will be bought.

Please note its similarity to The unexpected hanging paradox.