How old is it, or more importantly, how often was it used, and how was it stored?
The way it feeds might make it more of a quilter's edition.
In USD that's about $245, correct? Seems a bit much to me for a used machine.
Janome is very trustworthy. I would probably test drive and negotiate a lower price. I saw new ones advertised for a slae price of 299 euros when I went to look up a description of your machine.