Four key market forces at play 

November, 17, 2012
11/17/12
8:36
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Jurickson ProfarOtto Greule Jr/Getty ImagesThe value being placed on top prospects such as Texas' Jurickson Profar is very high.
Only 20 days have passed since Sergio Romo struck out Miguel Cabrera to end the World Series, but this offseason has already generated one of the biggest trades in history and some aggressive signings. There are many market forces at play, baseball officials and agents report. Among them:

1. The Sticker Shock