@YodelDogs:
I think this is an unfair statement as it implies that if you care about a dog you (practically) give it away and if you don't you ask money for it. If the owner of the dog cares about it they will screen the home carefully regardless of what they may be asking for it.
I don't think I was implying any such black-and-white generalization at all. My statement applies specifically to Craigslist, which I think is a risky medium for rehoming dogs as it makes dogs completely vulnerable to exploitation unless homes are carefully screened, which most people don't do, at least not in my area. I agree that screening a home is the best way to show that a previous owner cares where their dog ends up, moreso than any dollar amount (or lack thereof). However, what I often see is a false assumption that a higher "rehoming" fee assures a good home in and of itself, which is not true. Admittedly, there's no clear definition of what is a "reasonable" Craigslist rehoming fee and what is a sale. Craigslist itself does not say "Anything over X dollars is a sale," but its terms of use are explicit that no animal sales are to occur on its forum. And that's why rehoming fees SHOULD be kept low on Craigslist.
Young puppies and adult dogs rehomed by private individuals, responsible breeders, and rescues, who make use of other, non-Craigslist venues go by different standards altogether, including monetary ones.