Nice! I do it all the time at estate sales. The sewing machines are always the last to go. So wait til the last day, hunt out the ones that have lots of attachments and the original manuals, clean them up and sell them on eBay! I generally make $50-100 each! Want my big tip? Advertise the older ones as "Heavy duty" and put a picture of a few layers of denim that you've stitched. When I started doing that, I added $20-50 of profit to every machine! And it's not false advertising-it's GOOD advertising!