Information released in a Forbes magazine report about the Detroit Piston franchise's worth was that it didn't sink to the Cleveland Cavaliers' level.  Detroit, valued by Forbes at $479 million last year, is reportedly worth 25 percent less this year ($360 million) and finished with the NBA's second-worst dip, behind a LeBron James-less franchise that's lost 18 straight games.  Among all NBA teams, the Pistons dropped from No. 4 to No. 13 in value in one year. The Knicks have the highest value, according to Forbes, at $655 million.