I'm just watching this just now and even though Kira put a word in for Quark to let them have Keevan I'm just wondering how exactly did Quark manage to convince Sisko that he wanted Keevan to exchange for Ishka? I mean they were going into neutral (?) territory with just six Ferengi and the possibility of facing an unknown number of Jem Hadar soldiers. Did Sisko actually reckon on Quark succeeding and returning back alive?