I'm concidering some CPC advertising, and was wondering if anyone could give me an idea of what their conversion rates were like? Not exact number, but rough estimates? What is the average pst per client? (IE 30 clicks = 1 new client on average - at an averace CPC of .25 per click working out to $7.50)

Anyone care to jump in and share some info? PM's are cool as well if you dont want to make it public.