Reply To: Crosman 600 Semi-Auto
On Ebay and AA you can find them occasionally between $150 and $250. If working then around $200. If it needs sealing but has all the parts, between $150-180. If it has a few parts missing but nothing critical then around $130-160. With the original box and accessories, not less than $200 like Wadcutter said, and more like $250-300 if working as intended.
Rebuilding service (there are couple of folks who do this, maybe more) is between $55-75 plus shipping.