Ugg boots info please?

Hi i really want to buy a second hand pair as i can't afford them new so i want to be sure i don't buy fakes so please can anyone help i have read up its alot to do with the label inside and they should not say made in australia it should say australia in the logo but not made there as the material comes from australia but they are made elsewhere could they say made in china? can anyone help please answer only if you know and thanks for you help :-)