Baseball Trade Values - What's the Practical Limit?

Sodo has rejected a 15 year, 400 forty million dollar contract extension. Some people have joked that teams could trade their entire farm system for one sodo. I thinkat your minor league, your minor league rosser limitations would be a barrier to some sort of crazy branch ricky type thing. Do think that there are some teams in position to do it? It woudn surprise me if the dodgers do as well.