1)
www.yahoo.com
Openly: 18-Jan-1995
Price: $3,781,719,510

2)
www.google.com
Openly: 15-Sep-1997
Price: $2,670,839,190

3)
www.myspace.com
Openly: 22-Feb-1996
Price:$2,402,409,207

4)
www.msn.com
Openly:: 10-Nov-1994
Price:$2,075,740,203

5)
www.youtube.com
Openly: 15-Feb-2005
Price:$1,583,955,404

6)
www.microsoft.com
Openly:02-May-1991
Price: $1,455,768,506

7)
www.live.com
Openly: 28-Dec-1994
Price:$816,584,998

8)
www.baidu.com
Openly: 28-Dec-1994
Price:$804,499,505

9)
www.orkut.com
Openly: 08-Dec-2002
Price:$777,030,819

10)
www.wikipedia.org
Openly: 13-Jan-2001
Price: $299,711,546

[via Jaxey]