initial cost

As a newbie just learning about everything-ish, I was wondering how much you initially invested into your first SUCCESSFUL website? AND how much would you say you spent until you hit your first "successful" venture or investment?

Hello bhw, Am new to the domain business. After reading a few articles about the business, I think am old enough to dive into the it. How much should I start with? Am not planing of getting into expensive auctions. I don't have that much money to invest.