straw from the field

Reviving an old topic but was wanting current feedback.  In the past everything in our area has always been done by the bale, weather you are buying or selling rounds.  i have been transferring my hay sales from "by the bale" to tonnage sales.  My question today is if someone is buying wind row wheat stubble to bale, what is a fair price to be paying by the ton.  I have asked around and no one in our area is doing this but i have a neighbor that would like to sell his wheat field in this manner.  The only way i can figure is to calculate nutrient removal and then add some to that amount to make it worth his time.  Any thoughts will by appreciated 

straw from the field