Mickey2

Here the marked for a used machine is pretty stable, a 201 will go for around $60 dollars, even when it needs cleaning and a bit of work. Fixup machines turns up at give away prices some times, and prices vary in general. Much the same for any good used model $60 to $170. The old Berninas and Pfaffs will easily go for $120 in working condition. They arent' always easy to sell, but with a bit patience they will go. At give away prices they will be piced up in a day or two. Treadles can take time to sell around here, and they need to be in reasonably good condition.

For vintage and antique, there are trends too. Some furniture will alway go quickly. At the moment, teak and palisander from 1950s to 1980s go very quickly and increasing prices. They have to be in good original condition or gently restored. At times toys have fetched high prices, some 1930s Schwinn bikes had a wave of popularity that seem to have deflated quite a bit. I personally look for some nice 1930s furniture, or classics in general. I need some nice polished wood and a bit of color to the fabrics. Everything(!) turned grey here the last decade.