Luger ID

Just found this great site. I'm a shooter who always wanted a Luger, primarily to shoot and enjoy. I just came across one for what might be a good price, but I'm a little wary since I can't shoot it before purchase. The finish is about 85% with holster wear and some pitting on the outside of the barrel. The marks on the top of the gun are that sqiggle type design on page 4 of the logo's. The front marking is a 1915 stamp which I assume to be the year of manufature. All the numbers I could find seem to match. Is this a parts gun? The logo's page doesn't indicate these two marks together. I think I can buy it for under $600 with a holster. I know it's tough from the lack of info, but is that number totally off? Any help is deeply appreciated.