Krupp luger ???

There is no such thing so the person must have been misinformed or it is a fantasy piece. Values on lugers and values on holsters are two complex subjects. Provide detailed marking and condition information about each of the two pieces and we can go from there. Start with the luger markings on the chamber and on the front of the frame--that is enough. Also find out if it has all factory original parts or if it has had replacement parts.