Best place to buy a baby doll?

We're getting one to help my son get used to a "baby" in the house and I'll be using it to show him feeding the baby, changing it, being quiet while it "sleeps" and things like that. So hopefully he's used to seeing that and it's normal for him by the time we actually bring his Little sister home. But where's the best place to get one? Preferably one that's not super expensive but looks more like a baby than a cartoon baby. Doesn't need to be super realistic, just not one with painted on eyes that don't shut and things like that.