$125
1971
H&R and New England Firearms are one in the same, NEF holds licence to the old Harrington & Richardson brand names, if it is a H&R Huntsman 45 caliber black powder single shot rifle 28" round barrel then the value is in the $100 to 125 range in 90%+ condition.
100-360 or so
Depends on what caliber you are comparing it to.
50- 250 usd
need more info to answer. Make and model, please.
100-400 USD
about 5 to 600 dollars
They sell between $125 and 250 depending on condition caliber and extras (scopes, stocks, 209 primer conversion)
50-100 USD
It shoots shot...
Blue Book of Gun Values will help.