I have the same exact gun passed down to me from my godfather. I took it to a reputable gunsmith to see about having it re-plated and he assured me that the cost of re-plating the gun would far exceed its value. This leads me to believe that these guns are of great value only in the sentimental arena and not so much the resale arena. The serial number on mine is 1471. I would be interested in finding out what the model number or the reference name is so I could look into getting some replacement parts. Sorry to deliver bad news to you but this is the case with a lot of these old pistols like this. I could be wrong, this is just what I have heard from some people that I trust.
Consult with a good gunsmith.
25-150 USD or so
$100, more or less
$50-100, depending on condition.
No way to tell.
More information needed to determine model of firearm.
"BB" prefix indicates 1985
@ turn of the century; less than 100 USD
H&R made utility firearms from 1874-1986. 50-100 USD
1971
No such thing as 22 "caliper". 22 caliber, yes. 10-100 USD or so
50-100 USD