​1998: Yahoo refuses to buy Google for US $ 1 million
2002: Yahoo realizes its mistake and offers to buy Google for US $ 3 billion. Google wants US $ 5 billion. Yahoo refuses.
2008: Microsoft offers to buy Yahoo for US $ 40 billion. Yahoo says no.
2016: Yahoo sold to Verizon for US $ 4.6 billion.
In business, like in everything else, timing is everything.