Wow, I am glad you posted this, I have the same problem.Great tips everyone!!!
My MIL bought a box full of old fabric at a yard sale for me. The top half of the box(fairly large box too) was yards, 1/2 yds etc.. but the bottom, OH MY! already cut pieces for a log cabin quilt!!! I was so thrilled!! I have no idea how old these fabrics are but guess 1950-1970 maybe older.