Happiness is a Crosman 600 in this kind of condition complete with original box and paperwork. I took a chance on buying this one blind from a Gunstar advert - luckily it was as described. Despite shooting well I had it stripped, checked and resealed by that fine gentleman Lawrie Amatruda. He kindly allowed me to watch him do it which was a most interesting experience.
Its hard to describe adequately how much fun shooting one of these is - if you get the chance to shoot one then take it - be warned though, you will want one!