You will have to call Ruger. You can get the phone number from their web site.
If it's a MK II, it will be marked as such.
25-250 USD or more depending on specifics
Assuming you mean a Ruger Mk II, it will depend on condition, barrel, sights, etc, but probably $150-$275.
$5 to 100 check on ebay
In 1945, cost was $319 US dollars. BTW, you have asked about most weapons- a US Mk 2 hand grenade was $1.
Generally not sold, so there will not be enough sales to determine a value. A high grade Mk II is around $500
It is not possible to say exactly how much the first nuclear bombs cost. The Manhattan Project cost $2,000,000,000; but most of that was to build the industrial infrastructure needed to enrich uranium, produce plutonium, fabricate bomb parts, and deliver the bomb to the target. Once setup the incremental cost per bomb produced is relatively small.I estimate that the Trinity Gadget MK-III, Hiroshima Little Boy MK-I, and Nagasaki Fat Man MK-III bombs cost well under$1,000,000 each.We had in production or scheduled for production a total of 23 nuclear bombs to be dropped on Japan in 1945 should she fail to surrender, only the first two of these were used.August three bombs, 1 MK-I & 2 MK-IIISeptember three bombs, 3 MK-IIIOctober three bombs, 3 MK-IIINovember seven bombs, 7 modified MK-III using new composite plutonium/uranium coreDecember seven bombs, 7 modified MK-III using new composite plutonium/uranium core
No such weapon in the Ruger line
100-500 usd
$275-$450 depending on exact mdel, barrel, sights, etc.
Mk VI, Vickers Mk VII, Tetrarch Mk I, Matilda Mk II, Matilda II Mk III, Valentine Mk IV, (A22) Churchill Sherman Mk VI, Crusader Mk VIII, Cromwell Comet I (A34) Centurion (A41) Archer