You might want to visit the P.38 Forum and check in there. Some of the top P.38 collectors in the nation are regulars on that forum, and many top collectors from around the world visit as well. If you can post four detailed photos -- both guns, both sides -- and provide a description of the numbers and magazines, the folks there will be able to tell you exactly what the guns are worth.
The Mauser-made byf 43 in your top photo is a nice-looking piece. If it's all matching, and if the magazine is correct to the pistol, it could be worth $800 or so, though many variables must be considered. The rig would add another $100 to $150, or more, depending on its condition and whether it's original to the gun and/or the period.
I'm sorry for your loss, by the way.