I know what you mean! I never heard of them until I rescued a stray dog. The folks at the vets office didn't even know what he was - one vet tech was close, thinking he might have been a mini-pin mix. I blew off her suggestion until I looked through a dog breed book and saw a photo that looked exactly like him - under German Pinscher. Since then, I've been reading up on the breed.
I guess people just toss out treasure in my neighborhood! (He was dumped out of a car because he had a bad wound.) I was shocked to find out he's a pedigree, and I'm so proud of him!