Since you pulled out an old thread Matt, I will respond in todays context.
The highest price I have ever seen listed on a competitors proposal was $ 4.00 per square foot, not identifying if it was OSB, 3-ply cdx, or 4-ply cdx, which was on an HD proposal from about 7 years ago on a job I acquired.
My current pricing is at $ 2.00 per square foot, for the better cdx choice, whether for R & R or for skip sheathing overlay.
Also, the unit price for a 1" x 6" starts at $ 3.50 per lineal foot, R & R, with the price per board lineal foot increasing proportionately with the larger sized boards. Although, per APA standards for reducing expansion and contraction, no larger than a 1" x 6" should be installed when butted together to create a solid deck surface.
Coincidently, does anyone here realize that the specification for overlaying cdx on top of the original skip sheathing, is to install it in the vertical direction, rather than the horizontal direction. I'm not saying I accept their ideology for that method, but that is what the specs regarding this circumstance dictate. Does this make anyone else here want to scream B.S. to that!!!
Ed