Badger 400-2 touch up gun

I recently picked up a couple of boxes full of stuff for a little of nothing and as I was sortin thru I come across what apears to be a nos Badger 400-2 touch up gun  although there is no instructions in the box the gun looks to be new the cork gasket on the lid is not even discolored.  I was wondering if anyone new what the worth of this might be.  thanks    

Source: http://cs.scaleautomag.com/SCACS/forums/thread/1002965.aspx

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