Honestly speaking, I feel like Green is one of those guys whose value is dependent on how averse you are to risk.
If I owned Green, which I do in a one-year league, I'd want more in return if I was trading him for Yandle. Enstrom I'd want quite a bit more.
If I owned Yandle or Enstrom, I'm not sure I'd want to pay that much more to get Green lol.
I'm gonna side with the Green side just for the upside, but I am admittedly a bit biased.