Old is ok as long as it is in good shape. I consider it to be "too old" to use when it is no longer pleasing to my eyes. My tastes in fabric have definately changed over the years. If you no longer like it, sell it, give it away, donete it or make it into a scrap quilt. I had a bunch of fabric in my stash that I no longer liked. I called it my ugly fabric. It bothered me staring at me from my stash but I no longer enjoyed using it. My Guild held an auction where you brought quilting things you no longer wanted and auctioned them off. Several ladies were bidding like crazy over my "ugly" fabric and were thrilled to get it. All proceeeds were used to pay for one of our charity projects. We raised a lot of money.