Hi John,
Fine looking 'G' you have there, and nice pictures too. I am certainly not the most experienced person in this forum, but I can tell you a few things.
It is rather difficult to see the suffix clearly (the italic character under the sn on front of the receiver and the magazine), but it looks like an 'e'.
It could also be a 'c'. Anyway, it should be any character between 'a' and 'f'.
When 'e' it is a so called G date-S/42 Luger, produced by Mauser works in 1935, of the 2nd subvariation. The resolution of your pic's is not high enough to read the Army acceptance stamp on the right side of the receiver, it should be Eagle above 211 I think, the other stamp might be anything between B 90, S 91 or S 92 between two curled lines. There is no sear safety, so it would propably not have been issued to a Police force, and alsmost certainly to the German Army.There were about 20.000 pistols like that made.
In Jan C. Still's 'Third Reich Lugers' you could read more details of this 'G' type on pages 27 through 38. A good book, you really need to have it.
The holster looks also fine, but I cannot see any stamping on the back or front side. Please quote the name of the manufacturer, it should be on the backside. The year of production matches the pistol perfectly.
Well you see, you get more questions than clear answers from me. But the details make the difference...
It is very slippery for me to estimate a value - the details asked for are important, and prices vary greatly between dealers, fairs, deals between fellow collectors. May be someone closer to the market in the USA could give you a reliable value.
All over, this rig looks fine, with less than usual wear.