Last year I found a Bernina Minimatic 707 sewing machine for $20 at one of the Goodwill stores in town. It didn't have a power cord or a foot pedal, but I thought finding one would be easy. Boy was I ever wrong!
The only place I was able to find a cord with pedal was on ebay and it's not even
an original. The regular price was just under $50, but thankfully the
seller had a "make an offer" option and I was able to buy one for $35
with free shipping.
My combined total for this machine was $55. I've tested the machine and it works very well and will be just fine as a backup.