The Vintage Singer Sewing Machine Blog: The Difference Between Domestic & Industrial Sewing Machines (or, How Not to Get Swindled on eBay & Craigslist)
Industrial Sewing Machine Pfaff Walking Foot - general for sale - by owner - craigslist
industrial sewing machine - tools - by owner - sale - craigslist
Industrial sewing machine - electronics - by owner - sale - craigslist