two people misunderstood each other, and made choices of action for various valid, or maybe, confusing reasons. it happens. that does not indicate either person was lacking character or good faith.
shake hands, make a deal, and move on. or, shake hands, don't make a deal, and next time the buyer and seller both try to avoid any confusing points of a transaction.
ps: an attorney is not needed, in this situation.
i really don't understand how this became a public issue, but i realize i am a bit more trusting and naïve than the average person, and sometimes miss the the big picture.