value of 1942 P38 taken off solier with eagle stamp and holster

I am trying to value out a P38 lugar from 1942. It is my understanding that this gun is just a P38 because a lugar is a different gun. The gun has the swatzika and eagle stamp on the gun. The gun has not been shot since 1942. Under the blue book values it is may understanding that it is valued at $1800 plus an additional 30% for the stamp. Making the gun worth $2340. The gun also has the original holster with the stamp on it also. The owner is trying to state the gun with holster is worth $6000. I could only find the value at $2340 plus and additional $700 for the holster. Please the me know if you believe this gun with holster in excellent condition may be worth $3040 or if there is anyone else that may help.