My Rhett weighed 4 pounds at 10 weeks, he's 10 pounds now
. I personally like the bigger guys, they just feel more "sturdy". But there is more than just size to take in to consideration when buying a yorkie.
Is he AKC registered?
Were his dam and sire certified prior to breeding?
Does he come with a health guarantee?
Has this breeder had any problems with the health of his line (liver shunts, LP, etc)?
My guess is that at $350, the answer to the first 3 is a resounding NO.