I think he’s lying. German shorthair breeders have pretty lengthy (usually) waiting lists for their puppies so it’s very unlikely he’d be firesaling them on Craigslist. I don’t think any responsible breeder would put their dogs on Craigslist because of the number of people that get animals from there for cruel purposes. I googled his number and didn’t find anything anything that has to do with a dog breeder. And finally, at least in my experience & that of everyone I hunt with, the breeder doesn’t register puppies. The new owner does that.