699.5123 lbs., approximately.
I spent today pulling about 300 screws out of an old truck body we had ripped apart with my bud's backhoe so it could go as clean aluminum at $.57 a lb instead of dirty at $.18...Got $250 instead of $80 so I figure it was worth it. If you have the right tools (Sawzall and bolt cutters do great at separating) and a little time, it might pay...Or not. Aluminum is so light it take a bunch to get any weight. An entire box truck body netted me only 440 lbs. of aluminum...