Re: 1917 German Luger
One thing to remember, there were no military Lugers with ivory, pearl, or stag grips. Period. Those were added in the U.S. by people who believed they made the guns more valueable when the opposite was true. The same with plating - silver, nickel, chrome - is always after service, done here or in Europe after WWII.
I don't know what IronB means by "in silver", but silver coins with a face value of $100 would be worth a lot more than $100. Depending on the coins, maybe a whooole lot more.