I think whether or not you do eBay depends on the quality of the fabric and whether you will have any help. It does take time to photograph, measure, package and mail, but you usually get substantially more than the garage sale prices that you'll get at a sale. If you have coordinated groups of fabrics or collections of name brand fabrics, you'll probably do well. If, however, you just have a lot of random Joann's and Walmart fabrics, you'll most likely be better off to just have a sale.