I love scrap bags - have gotten some of my best fabrics this way. They're great for strip quilts and for samples of fabric that I may buy more of in the future. I've purchased a scrap bag online from
www.4my3boyz.com for $3.99 which was very nice, and I've also purchased one from
www.mybluebamboo.com with which I wasn't so happy at all because the fabrics were nothing like what they sell as yardage (their yardage is beautiful). Sometimes local quilt shops will also sell scrap bags - there's one in my area that sells them for $4 and I usually buy four at a time.