Question before I buy

[jd_1898]

I going to buy a Luger 1939 42 Code Mauser pictures look real good all matching except grips and clip.

question what is this worth?
what is the differance between a 42 and a S/42?

it also comes with a take down tool and a 1937 voegels holster

is this a good luger to collect?

I don't want to get ripped off