Off topic. yahoo amazon msn cnn domains how much ?

I wonder what domains like yahoo.com amazon.com hotmail.com msn.com would cost to buy today, compared to 1995, when Í started surfing the web. I remember search engines like lycos, altavista which are still around, but who seems to have lost market shares. I have owned a bunch of domains myself, and as I used to work for a couple for Internet Service Providers, I had no problem hosting them. One of the benefits working for an ISP. Today you can buy a domain very cheap, and get a huge variety of support for your backend. SQL, PHP, CGI, DNS records automagically etc.. This is fantastic, as noone needs to be an expert of all the different techniques, to becoma an owner of a dynamic and technically advanced website.

Any suggestions on what a domain like yahoo.com amazon.com cnn.com would cost today, let me know!

A billion dollars ?