the best doll I found was in the $10 isle at either target or walmart. they usually come with a pacifier attched and sometimes hae a few little accessories in the box. they are just plain old dolls no fancy features. there are also water babies that most little tiny girls love because they are squishy. you can find those at walmart.
if you want something nicer Grand Rabbits or Playfair toys in Boulder both have nice Carroll brand dolls that are basic babies and American Girls doll company makes a "bitty baby" series that are just plain dolls (some have hair some don't) They are on the pricy side, but dolls do last forever.