I usually buy 1/8" ply from Michael's for convenience, but I also get it from Rockler Woodworking sometimes. I hadn't paid exact attention, but I knew the prices were close, and the convience out weighed the drive across town. So, I had some time after work today so I decided to check into the price of BB plywood.
At Michael's I get a piece 12"x24" for $3.99 (which is $1.99 per square foot) a similar size at Rockler 12"x30" is $5.49 (which is $2.20 a square foot) So Michael's is actually a cheaper place to buy that size.
I did the math on all of the sizes of 1/8" bb ply that Rockler has and the square foot prices $1.80-3.99 (sizes 12x30, 12x15, 24x30, 11.75x60, 24x60 if you care) I have to buy a 24"x60" piece to get a better price then Michael's.
Also the Michael's birch plywood is made in Illinois!
I thought I would pass this along to those of you who might be like me and buy smaller pieces of plywood.
Katie