The Mets wounded the Phillies by acquiring Billy Wagner, Philadelphia's former closer. But the Phillies have set their sights on a player the Mets have coveted: Manny Ramirez. Philadelphia and Boston have engaged in serious talks about swapping Ramirez for Bobby Abreu, The Post has learned. Abreu was shopped by new Philly GM Pat Gillick during the GM meetings in early November. Ramirez's unhappiness in Boston has been evident for months, if not years, and culminated with his apartment in the Residence at the Ritz-Carlton going on the market Tuesday for $6.9 million. If the Phillies land Ramirez, it would be a huge counterblow to the Mets. Constant speculation was that Mets GM Omar Minaya's flurry of winter activity would be capped with a knockout acquisition of the eccentric outfielder. Minaya landed Wagner on Tuesday, and the fireballing lefty blasted the Phils for going backward while the Mets became a stronger playoff contender. The Phillies believe a Ramirez deal could get done if they want. Apparently, the stumbling block is the disparity in salaries. Ramirez will earn $19 million next season and $57 million over the next three. Abreu will earn $13 million in 2006 and $15 million in 2007. Also, Abreu has a no-trade clause. He may want his 2008 club option for $16 million exercised if he waives the clause.