It's that time of the season. We're a quarter of the way through and fantasy baseball managers are accessing their rosters. Team strengths and weaknesses are identified. Trade offers are made. Some are rejected, others countered. In many cases, deals are consummated. While there's an art to trade negotiations, formulating and evaluating potential deals is a science. What follows is the next-level approach to analyzing trades, apropos to offers both made to you and those you propose.