As with any firearm, it is not possible to accurately appraise a gun without seeing it. Condition, and original configuration will determine value. Recommend that you see a local gun dealer for an appraisal. You can also do your own investigation by looking at other models being sold that are in the same condition as yours. Try the gunbroker.com or a periodical called "The Gun List" You can also reference the Blue Book of Gun Values which can be purchased on line at various retailers.
50-225 usd
75-200 or so
50-200 usd
50-200 USD depending on specifics
50-200 usd
IIRC it was contracted out.
This should be a Nomad model made in 1962. Not a Buckmark although similar
100-2000 usd
50-200
50-350 usd
5-500 usd
50-2000 USD depending on specifics