Welcome to the cafe!
You need some serious SPs. Look for a team that has no relievers, and see if you can package C. Cordero & Aquino for one of their mid-tier starters. If they are desperate enough, they may go for it.
Agree with the idea of trading Rollins for a starter - should get a very good one in a straight trade.
Castilla won't help your team this year, and if you can get Reyes, go for it! Can't believe he wasn't drafted (or was and then dropped)!