The one at the Thorncliff gun show Saturday was pretty decent in shape. Looked like a good deal, at $100/mag is fair for PP Sport (with that base, which is unusual).
They made the PP Sport in several different factory configurations, and 50s pistols were interesting. They were all made in Ulm, parts shipped over the border, assembled and proofed there... There is a lot of disinformation about how the made in Germany guns were actually French. Not so, the Walther factory in Ulm was quite busy, and the 50s and 60s pistols were exceptionally well finished. I have some early Manurhin examples that are much prettier than their later plain Walther marked versions. And of course all the parts fit and interchange, from 1930-whatever through to whenever it was in the 90s that they quit making them, in Germany and France.
My own favorite PP Sport version is the Manurhin long barreled PP, with the standard hammer and double action left intact.
This one is an 8", and the wooden grips also came from France.
The 6" you're looking at is less awkward and no less accurate. In all the ones I've seen, double action is disabled by putting a pin into the trigger, which can easily be removed by someone who knows how...