98% of the marketing agreements ARE unpriced. Also one other difference with fat cattle is that you can't hold them indefinitely. If they are ready the 1st week of November you don't hold till the 1st week of December. One incentive in these unpriced contracts is that you are guaranteed a market--you can ship. I've seen times when there is no cash market. You can't ship.
Also I am aware of markets where there are only 2 fat buyers, period. No other options unless you want to try to sell 40 head a week to a local butcher who can only handle 5.