Welcome to the Lugerforum.
From your description, I THINK can tell you that the gun is commercial and not military in origin... IF the serial numbers are somewhat hidden and not out in the open like a military gun... but that doesn't preclude the possibility of it coming here as a GI Bring-back. $2K sounds quite a bit high, even with a 1941 holster... (which IS appropriate for your byf Luger!)
Lacking photographs, can you tell us if it had a stock-lug at the back of the grip like your other Luger? or is back of the the grip frame smooth?
... Based on the lack of finish that you described, I would say that the price is widely ballparked in the $750-$1100 range... WITH the holster.
The grip safety would likely work better once the gun is properly cleaned and lubricated.
Get us good close-up and focused photographs and we will do a much better job of evaluation.
It is most likely post WW1 and from DWM production in the 1920's, but I will let others confirm that.