I've suddenly become a fan of the Walther PPKs and other Walthers like them. I'd like to get one soon, and am wanting an older one, not one of the S&W ones. Any tips on what to look for? I want a .380 or 9mm. Which models can you get a threaded barrel for? I'd like to get a 9mm suppressor soon, and I'd like to be able to use it on the Walther too....thanks, I know nothing about these pistols except for they look cool and feel good in my hand.