Originally Posted by NinjaSteve

I think a person is "successful" when they can afford to live off of their money webmaster income. Once you achieve this, you should set levels you want to reach and then call that being successful. Or sustain an income you want.

1 sale per day * $30 on average sale would be $900 a month. - expenses (- tax money you set aside) = profit.

So basically....
1 sale a day = $10,800 a year
2 sales a day = $21,600 a year
3 sales a day = $32,400 a year

... and so on... but don't forget taxes , hosting , and other expenses.