As G2 says, many more pics are needed. These have their own quirks, quite unlike most other standard production lugers. Parts numbered in odd places, different finishes on the gun, odd E/2 stamps of varying quality, marking of parts that can be different between two pistols manufactured in the same year, magazines that have their own oddities...
These are easily the strangest of all factory production lugers and they are often the basis for a lot of controversy. After studying up on them for the last 7-8 months, and finally purchasing one, it is worth your time do do your homework. A 90% or better gun is gonna run in the $6-7k range or more (based on condition) on the broader markets, and that is for a common S-code or 1936 date. Ad 15-20% or more for a matching magazine. Expect the price tag to go up as you start talking about '36' dates and other years with low production numbers. If it's a 1936 that's good; I'd feel safer with something a little more common and worn as this one appears to be.
Now, how that will play out when buying it from a family friend is a whole 'nother can of pig knuckles.
Here's a few to get an idea. Note that two of them have non-HK magazines. Expect to pay in excess of $700 or more for a legit HK mag if, and when, you can find one.
Legacy has 3 for sale on their luger pages. You can search their sold auctions to get an idea of what they'll generally go for in a retail setting.
Buy Luger pistols from WW1 WW2 Model P 08 handguns by Mauser, Krieghoff, DWM, Simson Black Widow Lugers, Artillery Lugers, and complete Luger rigs
legacy-collectibles.com
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