The Birds' value is listed as $1.123 billion, up 1 percent from last year, when the Eagles also were ranked seventh at $1.116 billion.
The Eagles were fifth in 2007, but were leapfrogged by the Giants and Jets because of the new stadium being built at the Meadowlands.
The team's revenue is listed at $250 million with operating income of $48.8 million.
The Cowboys are worth $1.65 billion, the most of any U.S.-based sports franchise, according to Forbes. They lead the rankings for the third straight year and are worth $100 million more than the runnerup Washington Redskins.
New England is third at $1.361 billion, followed by the New York Giants ($1.183 billion) and Jets ($1.170 billion).
In all, 19 teams are worth at least $1 billion (same as last year), with the biggest gainer in Forbes’ rankings the Patriots, Chargers, Bills and Buccaneers, each at 3 percent. Oakland has the least value, not even reaching half of Dallas’ worth. The Raiders are worth $797 million, down 7 percent from the previous year.
According to Forbes, the system it used, "looks at the number of wins per player payroll (including all salaries, bonuses and benefits) relative to the rest of the NFL. Postseason wins count twice as much as regular season wins. We excluded any team whose current GM or coach was hired since the start of the 2007 season (this past offseason, 11 new coaches were hired). That narrowed our pool to 14 teams ... We averaged teams' player-cost-to-win ratios over the past two seasons and ranked the results."
The Giants pair of Tom Coughlin and Jerrey Reese was first, followed by Tennesee, Pittsburgh, San Diego and the Eagles.
To read Les Bowen's three things to watch in the preseason finale, click here.