What Is A Good Amount To Sell In A Year?

A salesman's worth is usually measured by the amount he/she sells in a year. So the question is what is a good amount to sell over the course of a year? £300,000? £500,000? £1,000,000?

I'm sure people will have differing opinions on what is a good number, so comment and leave your thoughts on what you think is a successful amount to sell in a year. Bear in mind we have just come out of a recession!