My husqvarna viking machine stopped winding the bobbin and it was because the computer board had gone on it. All the other features worked except the bobbin and the needle up/down. It cost me between $300-350 to get it fixed, that was a few years ago. The Janome sounds like a deal but look around on ebay and some other sites for current prices. After getting it serviced & fixed plus getting more feet you might have spent what a working machine would cost and it could be a headache getting the machine running the way you want it. Might not hurt to call a Janome store and talk to the technician, I've found that they will usually give you an idea of what might possibly be wrong and a rough estimate to fix it.
Heidi