NBA free agency is all about the market--with limited products (free agents), limited consumers (teams), and limited resources (cap room), it's largely about supply and demand, just like high school economics. But, just like in other businesses, once the market is set on a specific product, it can be very hard for a player and his agent to settle for less than "market value". The Lakers and the Knicks set the market for centers with two early reported agreements, and it's going to define the value of every center that we see signed for the rest of the summer.