Joel,
I was curious about that safety. It looked like a 90 degree, but I noticed that it was only at the 60 degree position. It looks like some one may have swapped out the safety with a newer model 60 degree type.
The guns value will range from $500 to a $1000. On yours I would say in the $500 range, just because of the condition and that safety.
The grips are going to be expensive to replace, especially since they are the older type. Earl's repair service has them, but I wouldn't doubt that he'll charge you $200 or more for a good pair of mottled grips that match that era. You might do a search on Google for Walther gun parts and see if you can find someone cheaper. If you want to shoot the gun, I would suggest you trade the grips out for some cheap black style and save those grips. Those mottled grips tend to break easily. I'm not sure how much it would cost to get that safety back to normal.
Devin