I totally agree, I've never let one of my puppies leave my house before 10 weeks. With me it is usually between 10 and 12 weeks. I just feel they are too small, not completely weaned from their mommy, haven't learned all their socialization skills, need to be more mature so they can handle being away from mommy and littermates. I wouldn't even buy one for myself that young. A couple of years ago I did buy a male and was told he was 9 weeks, but I swear he looked and acted like a 6 week old, he ended up dying a week after I got him, I think he was just too young to be taken away from mommy and his little body was stressed out from being taken away so young. I hope your friend will ask the breeders if she can hold the puppy until at least 10 weeks, if not I'd buy elsewhere. In my opinion, a breeder that sells that young, doesn't really care about the welfare of the puppy, just wanted to quickly get them sold.
Cheryl 