1) Sedo.com
2) Flippa.com
Not only these are popular sites but are the trusted business places for domain sellers.
You can Post Your Domain Many Of the Forum Site.
Several of the domain registrars have their own auctions, Godaddy.com is the most common place to put a moderate domain name up for sale.
Many nothing-special names with no page rank or significant age may only fetch $5 to $10.
You can buy your domain by giving advertisement or communicate with domain buyer.
I think you can on godaddy
