The asking price for Eagles quarterback Kevin Kolb may be on the rise. ESPN Radio Twin Cites has reported that Kolb's agents plan to demand a new contract from any team looking to acquire him from Philadelphia. One league source called the price tag "significant enough to make me nervous," based on Kolb's limited track record. He has made just seven NFL starts in four seasons. "There's no way I pay him like a proven guy," one AFC team executive told the radio station. "If you give up a (first-round pick), that's your guy. You're going to ride with him, so you're going to pay him. But you've still got to make sure that the finances are such that it's based on what he's proven. Whether you're dealing with the agent or not, he has to understand I'm paying part of the price in draft picks." Kolb is under contract with the Eagles for the 2011 season, but he has said that he wants to start.