I don't know why you want to do this. If the site bring you $ 50 a week, it doesn't make sense to sell it for $ 400 
I think you need to post a proof that your site brings 50$/Week that you find a buyer
I think you need to post a proof that your site brings 50$/Week that you find a buyer
I'm very sure of what I'm saying this website can give you $50 a week though I can't give you proof because it was monetized with google Adsense but now my Adsense account has some issues so let's judge from the look of the website.