no problem reusing the fabric. You may find that the ties left holes in the fabric tho and will have to work around those. As to value. While I'm not an appraiser there probably is not a lot of dollar value in them. And you can find feedsacks to add to what you have if necessary. Prices of feedsacks and pieces on ebay and other sites are way too high but it is possible to find them at reasonable prices. Large qult shows will have vendors with vintage fabric. I even have a couple boxes in the closet. So take them apart and reuse, remake and enjoy.