DeanD,
Here is the price sheet that Compass lake has to get a feel for prices.
http://www.compasslake.com/Price%20List.htm
The problem that you run into production barrels is how the rifling is produced and how the camber is cut. My self, I prefer to have the rifling cut, not button or forged. The U.S. Olympic team thinks the same way, and has their rifles built by Mark @ Rocky Mountain Barrel Works. The only draw back to this that the barrel takes hours to produce verses minutes the other ways. Hence, the long wait in order to get a barrel.
As far as price and availability, It will run you little more than a Krieger barrel. Mark's production times are done in batches of each caliber. But, some times you luck out and Mark may have a extra barrel that was made for someone who didn't want to wait. If you do plan on having a barrel made by Mark, you will need to send him a new bolt to have the chamber matched/reamed to the bolt. Also, think enough ahead to decide what the barrel is being used for; twist/bullet type that you will be using in the rifle.
This all matters when it comes to producing one hole groups!!!!!
P.S. Welcome to the search for the Holy Grail in regards to barrels and group sizes. It gets pretty ugly when you become Purist,,, And real Expensive!!!!!!!!!!!!!!!!