I've also gotten a very fine pup from a flea market, which goes against the grain of all the politically correct dog people.
I know what you mean. Many times on this forum I have read that "a good dog is where you find it." Whether a flea market, street vendor, pet store or the "best" breeder. If the pup is a good example of what the breed should be, I have no problem with that. They hype and animosity toward hobby breeders and others is many times over blown.
Will keep eyes open for a real working Rough Collie and let you know. If you happen to find a good litter please also share that with us.