Well, WW 2 was not in 1915, but your Luger pistol may be worth anywhere from $100 to several thousand dollars, depending on the exact model, markings, and condition. There is no way to judge from the information in your question. The best estimate would come from a dealer that knows Luger pistols. If all else fails, see if the are some gun shows in your area- you should find several dealers that can give you an estimate of worth.
500.00
No such model made by Walther
$300.00-500.00 usd
Every WW2 German badge had a swastika on it somewhere. There were some badges that had a large one in the center. But the value will depend on exactly the badge and its grade. Also, many German medals and militaria are reproduced so you have to ensure it is authentic. If the owner can trace it's ownership back to about 1960's then it is most likely original. A good site to help identify the badge is found by searching "axis history".
no real value. depending on condition - $100 to $200
made 1917. value depends on condtion
deactivated?
value depends on overall condition. Pictures help................
value depends on overall condition................
look on top of the pistol, just in front of the ejection port, and you will see the date it was made. value depends on condition
765.00
Depends on the item's condition and provenance. Check on auction sites for similar items.
15-45 dollars
value depends on overall condition..................
all values depend on condition. luger values depend heavly on condition & maker. Value can be from $1200 to $2500, that's give or take.............
10-10000 USD depending on specifics
No such model made by Walther
50-100 USD or so