Helping family sell this Luger

[5bassman]

An older family member is wanting to get rid of her father’s guns and one Is this 1918 Mauser Luger. I was told by others it has been refinished and that the magazine serial numbers have been added later. It’s all matching except the safety has a 22 instead of 20 but the last 2 has what looks like an arrow through it. And obviously it doesn’t have the original grips but the owners father appeared to like fake pearl grips since several of the guns had the same brand on them. Finish is really nice for a refinish. I was wondering if this is anything more than just a good shooter and what is a fair price to put on it. TIA