The Jets’ 2013 free agency needs are plenty — their funds, however, are not. That is going to make the Jets bargain hunters when free agency begins Tuesday. The story around the Jets will be more about who is leaving than who they’re picking up. They have 10 starters from last year’s team scheduled to become unrestricted free agents, along with another who will be a restricted free agent. Most of them are sure to depart as new general manager John Idzik maneuvers his way around a difficult salary-cap situation. The Jets are about $8 million under the cap, but they will need around $6 million of that for next month’s draft, leaving a small pool for free agency.