？
This isn't a bad deal, now is it?
Literal
This [topic-は] bad story is-not [conjectural-でしょう]?
A sales-pitch rhetorical question. 悪い話 ('bad story/deal/offer') is a set expression for 'a bad deal,' 'an unfavorable proposition.' The negative ~ではない ('is not X') + でしょう? ('right? / isn't it?') creates a classic sales-pitch rhetorical: 'this isn't a bad deal, is it?' Implicitly nudging the listener toward agreement that it's actually a good deal. Common in business negotiation, advertising, and friendly persuasion contexts. The polite でしょう makes it a 'right?' tag question rather than a genuine question.