Congrats on the Luger, kamilyun. After my grandfather died I was cleaning out his house and came across a Luger and a 1911A1 up at the top of his closet. Both were still loaded. I took them, cleaned them, oiled them and they both shot fine. I later found out the 1911 was the pistol my grandfather was issued before leaving for England. It is a Remington Rand model. It was still kept in the holster it was issued with. He had two mags in the mag pouch still loaded as well.
The Luger only had the one mag. It also only had four 9mm rounds loaded in the mag, I can only speculate that the rounds are the ones that were found on the Luger and the few rounds missing were the shots my Grandfather and his buddy's fired off after getting the weapon.
The 1911 has been appraised at 1500$. I would never think of selling it, but I wanted to insure it for what it was worth. It sits in an unloaded condition in my safe. The 1911 and the Luger are too of my favorite guns from my collection. Mostly for the history of both weapons.
Good luck getting that Luger back into shape. Maybe you will get lucky and get some good info about that weapon, like where it was manufactured, when, where and how. That kind of stuff always interested me. Trust me, there is a story behind that gun, it is fun to try to find out what it is.