Hummm...
I never hang around the EE much.
Are dogs commonly bought and sold on the EE?
I am NOT one of those people who consider dogs their fur-babies, but I don't consider dogs equipment either. I'd want to know WHY someone was parting with what should be a lifetime companion. I'd want to know why they expect money vs assurances the dog is going to a good home. Being in a situation (say you are getting deployed) where you have to get rid of your dog happen, but IMHO these situations you do what is best for your dog, not your pocketbook.
So, when I see something up on craigslist where someone is offering their AKC whatever for $1000, it makes me think something is up, like the dog is coming from a back-yard breeder just trying to cash in on a pup that hasn't sold during the 'cute' period or someone got a dog and paid $2k then it was 'defective' in some way and now they are trying to dump it but get at least some cash back. I'd not expect to see people selling dogs for anything over the EE, but now that I do, I think the same things as I'd think if I saw the ad on Craigslist...something isn't quite right.
Even the supposed 'rehoming fee' most people claim are to weed out craptastic humans, but the whole idea of the EE is being on arfcom the percentage of craptastic humans should be much lower than on craigslist so charging a couple hundred bucks to keep the bad folks away doesn't make as much sense.
Proceed with caution.