Ailton is departing Germany’s Schalke for Turkish side Besiktas after only one season at the Bundesliga club.
Ailton scored 28 goals for Werder Bremen in their League and Cup double-winning season in 2003-2004.
Besiktas have offered 3.5 million euros for the player, according to media reports.
“It is a good deal for everyone,” 32-year-old Ailton said.