From losing Lexi, I would look up so many of these sites. My fears of getting a hurt again makes me suspicious of everything. When you look up a puppy site, make sure you do a separate search about the Reviews of the puppy site. I found such horror stories.
Sorry I don't mean to scare you but it's best to be knowledgeable then to get hurt. All BBB.org helps too. They even have a story about Puppy Scams on the internet.
Hope this helps..