It is very difficult to find discounts on Uggs. I think that Ugg itself stops companies from allowing discount codes on the boots. I know that Kona Sports was allowing discounts, but they were out of the boot my DD wanted

. If you buy online, make sure that you check over at the official Uggs Website to verify that they are an authorized dealer. One hint is that authorized dealers will NOT have the word "Ugg" in their name or their website URL. Those are most certainly knock-offs and you'll be paying almost as much for fakes as you would for authentic Uggs.
The three most popular Ugg-like brands (Fuggs, as I call them

) are Emus, Bear Paws & the Costco Kirkland brand. Emus are almost as expensive as Uggs, especially if you get the shearing on the inside and not wool. Many people are just as happy with their Emus are others are with Uggs. Bear Paws are definitely cheaper in every way then Uggs. You can often grab a cheap pair of Bear Paws at Marshalls/TJ Maxx or Famous Footwear with a coupon. The Costco boots are really nice and very inexpensive.
My DD trashed her Bear Paws 3 years ago in less than a season. Her first pair of Uggs (purchased 2 years ago) were also ruined after a season, but Uggs stood behind them and replaced them for free. The second pair of boots held up very well last year and I was even able to resell them. I bought my DD a paid of Costco boots (they are talls this year and not shorts) and she loves them. I still might buy her a pair of Bailey Buttons but she has outgrown kids sizing and I refuse to spend $160 on a pair of boots for a 12-year old.