Like most people I've had afew mutts over the years.
Some were good dogs and some were great dogs. I've worled woth dogs my whole life and have seen very few that weren't "good" dogs. I have on the other hand unfortunately seen many Bad handlers/owners/ who had no clue and would never have a clue about dogs. /ubbthreads/images/graemlins/frown.gifBut I digress. /ubbthreads/images/graemlins/wink.gif
Inspite of the rhetoric about mutts that have saved the family from a burning house and was "the best dang huntin' dog I ever saw" Truth is it's a "Forest Gump." Pick one and you never know what you are getting. They may look like one or the other parent or nothing like them. You have no idea about temperament, size, or teachability.
This doesn't mean these dogs have no value. It depends a great deal on it's training and teaching.
The advantage of buying purebred[ registered] is that you start the process with a more realistic and acccurate expectation of the finished product. This is not a guarantee that if the beagle you buy is registered, that he can even find his food dish unasssisted. It simply means that he should be bred true to the characteristics normally found in the breed.
As far as charging big bucks, I've raised a few litters of purebred dogs over the years. If a person is breding responsibly and having the proper tests done for eyes and hips, etc. and sends the puppy out the door with proper immunizations and wormed, at $600 per pup he woon't make much money.
Mixed breeds at high prices, I fault the people that will pay it.