、。
You're quite the smooth talker, it seems.
Literal
Unexpectedly, mouth [topic-は] skillful [seems-ようだ][confirmation-ね].
存外 ('unexpectedly, contrary to expectations') is a slightly literary adverb, more refined than 意外に. 口が達者 ('skillful of mouth') is a set expression for 'smooth-talking, quick-tongued, fluent' — often with a faintly negative nuance of being glib. ~ようだ adds evidential 'seems like,' and sentence-final ね softens and invites shared acknowledgment. Overall register suggests an older or more refined speaker, mildly impressed or amused.