You can find really cheap Beats by Dre on eBay or even Bestbuy. But you can get wholesale Beats on their website sometimes during the January Sale.
China
You can buy them at Amazon.
Be extremely careful when looking for cheap Beats by Dr. Dre. Most of the Beats by Dr. Dre on the market are counterfeits. The only way to be sure that the Beats by Dr. Dre you are buying are real is to buy from an authorized retailer. Visit the link provided below for a list of authorized Beats by Dr. Dre retailers.
you can buy uggs less than 100 at zappos.com
i find that you could get them from imusici
footlocker
Everywhere.
You can buy Beats By dre from their website where they deliver to most if not all countries.
You can't Justin bieber got them specially made from a beats colouring website called colourware. You could ring colourware and ask them if they would make them for you.
Yes.
You can buy beats headphones at Apple  and beat like the food you can get it at any grocery food store :P
Well at Mermagica.com you can buy a tail for $100 +shipping or you could make a tail its way cheaper!