Welcome, and congratulations on your first Luger. I think the grips look great. This situation was discussed on
http://forum.lugerforum.com/showthread.php?t=28217 and the grips on your gun are another great example of honest wear. As it is pictured, I personally think it is very charming and wouldn't change a thing. The purchase price is attractive, as well.
You may want to consider installing reproduction extractor and firing pin for firing the gun. Though it is in "shooter" category, you will still cry if you break a numbered part. These two parts are classically the most often damaged in use, and in the case of the latter, an element of safety is involved. (Make certain the firing pin used is "fluted", or relieved, by three grooves milled into the front end of the part, just behind its tip. These prevent the ipn's being turned into an action-damaging gas piston in the event of a pierced primer.)
Enjoy your Luger when it arrives! Meantime, try to enjoy the feeling of anticipation...
DP