Washington Redskins owner Daniel Snyder has reached a preliminary agreement to buy classical music station WGMS-FM in a deal that would expand his budding sports-talk radio empire and likely be the swan song for the area's only classical outlet. Snyder and the owner of WGMS, Bonneville International Corp., have established a price for the sale but had not formalized the deal as of yesterday, people close to the negotiations said. They said, however, that an agreement could be wrapped up within days. "They made an offer that [a seller] can't refuse," said one executive involved in the negotiations. He requested...