I tend to agree with Bebee....see if you can find a used machine at your Bernina dealer. They will always refurb the machine before they put it out for sale, so you know you have at least a year before it would need service. The lessons included were necessary for me...(I like to learn by hands on).
That said though, this may be a good deal...do you know the person...trust that she has had it serviced regularly, have all the original parts and pieces??? Would it be something that you could use a while then trade in or would you want to do that? Would it have a good resale value?? I know...lots of questions...