I'm sorry, but I seem to miss the "negativity" you speak of. It's a matter of common sense. If someone cannot afford to pay for something, that they know of ahead of time (why not save up some money? don't have that kind of money?) then how can they afford something that you cannot prepare for ahead of time, something that needs IMMEDIATE attention?
A dog is a dog, and their love knows no bounds. I am not saying that dogs that cost less are inferior in any way, I am simply saying that dogs that cost more are often (but not always) at a higher price because the breeder, being a responsible individual with the future of the German Shepherd (or other breed) in their highest priority, took the necessary precautions before breeding their dogs. Yes, genetics is often a crap-shoot, but why not stack the odds in your favor? Why not try to better the breed, instead of introducing more PETS from unproven parents (both health and tempermentally), which will more likely find their way into a shelter or, in some cases, far worse scenarios.
Also, like it or not, people often see their dogs as an investment. Someone is far less likely to get rid of a dog that cost $1000.00 than one that cost $400.00. They are considered less disposable. Now, before anyone tries to get angry and throw a fit over that statement, no, I do not think that way. It is simply a matter of statistical fact. Just one more thing to think about.
Simply because a dog costs less does not mean that it is all that an individual can afford. Whether someone that picks up a shelter dog for $150, or a SchHIII World Competitor, they must be able to afford the care necessary for the dog.
When I suggested shelter dogs, I did NOT imply that they were in any way inferior to other dogs. Shelter dogs are incredible dogs, with so much love to give, so willing to take any chance they get at a new lease on life... but would NOT have been there if people spayed and neutered their PETS, and left breeding to the individuals who take the time out to better the breed and find GOOD homes for them, matching each individual dog up to people who make the perfect compliment to their personalities. Have written contracts, health guarantees, health screenings performed on all breed stock, etc. Again, I speak of a utopia where there are no shelters, because there is no need for them, and there are no morons dumping dogs once the honeymoon is over, or fighting dogs, or beating, neglecting, abusing dogs....
I'm getting off-track. When I suggested shelter dogs, I suggested them because if you love your dog so much, and want to help people experience similar love from the company of a dog, why not help shelter dogs find homes. Even if they cost less, they should still NOT be adopted out to individuals who can not afford routine and possible emergency care.
/end rant
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Lesya & Sophie 

A Dog Owner's Prayer
Oh Lord, don't let me once forget how I love my trusty pet.
Help me learn to disregard canine craters in my yard.
Show me how to be a buddy even when my sofa's muddy.
Don't allow my pooch to munch postal carriers for lunch.
Shield my neighbor's cat from view--guide my steps around the doo.
Train me not to curse and scowl when it's puppy's night to howl.
Grant I shan't awake in fear with a cold nose in my ear.
Give me patience without end--help me be my dog's "best friend".
Author unknown
Thanks to Pattie Lawler
http://www.behaviour-problems.freeserve.co.uk/2/Poems/dogownerpray.htm