The original post was asking about old fashioned shorthorns for grass fed beef. I have never sold grass fed beef so I am not an expert but I would think that cattle that were frame 3 or 4 would work best for that type of operation. We usually don't try to breed cattle with a frame size that small but if you are interested in seeing some shorthorn bulls that are slightly bigger framed take a look at the following 2 links
http://www.saskvalleyshorthorns.com/bullsale.html
https://www.youtube.com/user/whosyourdaddybull
You can view coyotes bulls on these 2 sites as well as ours. Bell M farms bull are in the catalogue but are not on you tube as of today
As far as the discussion about selling calves, I will put my 2 cents worth in on that as well. I cannot comment on the price of fresh weaned shorthorn calves because we never sell weaned calves. We background all of our calves and sell feeder steers and heifers at about 750 pounds and we have found that at that weight, and after they have been backgrounded, in our area, good quality shorthorn calves bring just as much money as any other breed of calves.
Where the shorthorn breed shines is in the cow herd. Over the last 4 decades we have had crossbred cows of every major breed on our ranch. While some breeds do some things well, we have not found a breed of cow that does as many things well as the shorthorn cow. Our shorthorn cows excel in docility and milking ability compared to any other breed. In other characteristics such as fertility, mothering ability, structural correctness, ability to turn forage into body condition, etc., our shorthorn cows compare equally as well to some breeds, and are superior to other breeds.
Remember, this is just what we have experienced on our ranch. Take it for what it is worth.