Some interesting comments here.  

I will point out the fact that over time as demand for our commodities world-wide has evolved so has the requirements of the foreign buyer for specific grade requirements.  

Just as in your local market you may find many different discount schedules among available elevators, so will you respective to foreign buyers or destinations world-wide. PNW is a 14.5 corn export market, dlvd NOLA export you will find bids/different basis levels posted for 14.5 corn and 15.0 corn, Hereford domestic market is a 15.0 corn market.