The Atlanta Hawks have begun listening to trade pitches for All-Star forward Paul Millsap in recent days, according to league sources. S?ources told ESPN.com that the Hawks, fearful of losing Millsap in free agency without compensation in the summer, are not openly shopping him but are taking calls on the 31-year-old and other pending free agents, notably sharpshooter Kyle Korver and swingman Thabo Sefolosha. Although the Hawks managed to sign Dwight Howard in free agency last summer to fill a frontcourt void, they were stung by the free-agent departure of Al Horford in that Horford, in the words of one source with knowledge of the team's thinking, got away "for nothing." The feeling within the organization now, sources said, is that it's best to gauge the trade market for Millsap, Korver and Sefolosha between now and the Feb. 23 trade deadline to guard against a repeat scenario.