I discovered today a Godaddy Discount Coupon which lets you buy those extensions for just 1$
Extensions are : COM - US - MOBI - BIZ - NET - ORG - CA - CO.UK - IN
Hurry up and jump to Godaddy and search for your favo. domain and when buying it insert this code : " SOCCER99 " to get your 1$ domain :D
Note : you can buy just one domain using this coupon :(