Is this trade a good value for me?

If I were you I would counter with Crawford in place of Wainright. Crawford is roughly 30 and a speed guy. He will slow down and in fact has been over the past few years. Just look at his steals total. He is a very good player still but not as good as Wainright. Wainright is arguably the best pitcher on one of the best teams in the National league. He led the National league in wins last year and should have a bunch in the next few years. Also the Cardinals have him locked up for several years so it is doubtful he will end up in the less pitcher friendly American League.