Our WM has what they call "discount fabric". They display it out front the day it comes in and then stuff it in the back bins later. I got some really nice red print fabric for my log cabin for $2.00 a yard, but when I went back a few days later, I had to search for the fabric in the back.
Next time you are at WM and have some time to spare check out the prices on the bolts. The discount fabric is blended in.