There are MANY ugg boots on sale without buying the celeb-endorsed and therefore exorbitantly-priced and mass-produced 'genuine Ugg boots'. Ugg boots in Oz and Nz are and have been for decades simply a style of boot, and it is still in those countries where you will find the best sheepskin ugg boots at a fraction of the 'Ugg Australia' ( made in China for an American co.) price tag.
You might be intetrested to know the "Ugg" label now known as Ugg Australia and owned by the Decker co. was sold to them by Celtic Sheepskin, from England. They still make amazing sheepskin boots and they're made here, not in sweat shops in China. They have a website Celtic and Co. Their boots are outstanding, they make up to a UK size 12 and also kids and baby boots, plus clothes etc. For cheaper but equally excellent quality go to Kiwi sheepskin, you'll not have to pay postage, and they pay the import charges.