People can post their ads under different categories on Craigslist. For example, a sewing machine could be listed under "Arts & Crafts," "Household," or "General." I usually click on the "For Sale" heading on the home page which searchs all the categories. Also, don't forget to search for misspellings - "sowing" and "sawing" for sewing. I rarely see any fabric for sale, but lots of sewing machines.
I found my 1961 Singer 500 Slant on Craigslist about a year ago. It was in good condition and came with a cabinet, feet, cams, and manual for $100. Not a deal to brag about, but a reasonable price, I felt.
Tate