It depends a lot on head stamp, quantity, and resized & tumbled or not. There are a couple of places on the internet that sell it fairly inexpensively, but I find most .270, 30-06, 7mm RM difficult to find in stock. Those are usually a seasonal for once fired. FYI, .270 win. and 30-06 are interchangable just by resizing and trimming to length.
Google "reloading brass" and you'll get a bunch of choices. I saw some once fired .270 and 30-06 last month 250 ct. for $59 shipping included.