Post #687361 by wizzard419 on Thu, Jul 25, 2013 3:12 PM

But in the case of the instruments and firearms, they can gain value from being old and the knowledge of their production run.

An old, broken (in this case), lamp covered in 50 years of food grease and cigarette smoke residue (which may be what the patina of the older lamps is comprised of) probably has not appreciated in value.