I just saw on Judge Judy a couple who bought an 18 month old Yorkie-poo from a 'breeder' (apparently she had already had 1 litter). The guy said he had 31 dogs and needed to get rid of some. He sold this dog to them somewhere on the street!!! Arrrggh!
When they got her home they knew something wasn't quite right - all she did was sit in their lap, never moving. So they put an ad in the paper and sold the dog to a lady, who the day after acquiring the dog took her to the vet because she knew she wasn't acting like a normal dog. Lo and behold the vet confirmed she would have been from a puppy mill.
And guess what - the couple paid $200 for her, and sold her for $400!!!!
Needless to say the lady got her money back.