WTF is with people who SAY they want a "good home" for their dog, but want to sell it for $500?
If you gave a rat's ass about a "good home" you'd be willing to give it away. Or return it to the breeder for a partial refund. Or ask for money for the accoutrements and not the pet. Or request that the "good home" reimburse you for the vet bills to date.
And don't get me started on the "I got this puppy 2 weeks ago and he doesn't like my cat". —We'll pay for the "right" dog, just makes me sick.