The printing on those selvage edges could be helpful as there is identification as to the fabric manufacturer, the name of the fabric pattern, the designer, and the code for the color number. There is also a little row of color dots with the colors that went into printing the fabric. Not all of this info may be on each but in quilt shop quality fabric there will be something most often. Some of us will cut off the selvage edges to make stuff out of. Just do a search for "selvage edge" patterns and you will find a lot of different ideas from quilts, to bags, to stuffed animals made out of those selvage edges.