My advice is not to! Not only is it against Blizzards terms of use, but you will be no better than the gold farmers that we all so hate! Any accounts you put on there will be banned, and very few people buy gold and accounts anyway any more.
Blizzard will lock all of the accounts you have listed for sale as it goes against their terms of use.
Trust us that wouldnt work don t be asking stuff like that what if a blizzard employee is reading this then they can see that someone is doing illegal account trading. And beside that would be nerdy of you to do that.
You would only need money for the domain name, and sometimes the website hosting. I would recommend using Office Live because it has free website hosting and the domain name cost $15 dollars Yearly
if your asking how to get a website you wont be smart enough to run it