The owner contacted me about this, I gave my advice and asked that he send some pics. He did so and posted the gun on Ebay but I was too oblivious to notice the messages. But, a Crosman speargun in the box is a rare thing (Have seen a good number of the speargun but this is the first one in the box). Great looking item. Word is that it went to France. The $900 price realized sounds pretty reasonable to me. Blue Book guesses $500 in 100% condition which is pretty reasonable on the collector's market. Hard to say what one would get without the box on Ebay.
http://www.ebay.com/itm/Vtg-Rare-Crosma ... 2994044960