I agree with all of the above...I don't want to repeat whats been said - but - Please don't go to a Pet store - there's alot of information here and the Net about Puppy mills and that's where most all pet stores get their puppies....
this is a good link about what to beware of when looking for a new puppy
http://www.hsus.org/pets/pet_adoptio...uying_a_puppy/
and PLEASE READ THIS THREAD right here ...this is full of information on all the scams out there
http://www.yorkietalk.com/forums/showthread.php?t=45984