Who sold Joseph?

One of Rabbi Menachem Leibtag's most brilliant shiurim ever is on this week's parsha. Here is the link. 

Unlike Rashi, who clearly thinks that the brothers sold him, Rabbi Leibtag convincingly puts forth his view that according to a straight literal reading of the Parsha, Midianite merchants took Yosef out of the pit and sold him to the Yishmaelim before Reuven, the brothers' delegate, arrived at the pit himself to sell him.  The brothers intended to sell him, but actually were beaten to it!  Read the whole shiur for the details. Or if you wish, open up a Chumash and see how the case makes itself.