I sent you an e-mail with other thoughts about this issue, but I forgot to mention that you can get a brand-new Janome or Singer for around $100, if you don't want to spend time looking for a used one. But I think you could find a used one on Craigslist or somewhere like that pretty easily.
I have to put in a plug for vintage machines. I have 3 and I just love them. Of course it depends on what you want to do with them, but they're all metal and just keep running and running. Inexpensive too.