We also have a 319K and my wife has used it quite a bit. It was somewhat noisy at first, but after a couple of oilings with use in between it did quiet down some. Tri-Flow works wonders there.
The needles are not that hard to get and there is a substitute if you can't find the 206-13s.
Bobbins are available as well.
It's a good machine, but they are individuals just like people.
Joe