That is a great price, I would probably go for it myself. I would make sure it has been serviced - either recently or take it myself - and make the purchase dependent on a good report from the tech.
I have a Bernina 440 with the BSR and embroidery that I bought used from a private party. Like you, I did not think I was interested in the embroidery but it was a package deal at a good price. I have found I do enjoy doing embroidery, whether quilt labels, embroidered dish towels for a quick gift, or custom shirts.
My dealer has an "adoption" program that I purchased to get all the classes I want plus servicing for a year. There is a series of 6 classes for the machine and 3 for the embroidery, well worth taking. You can also download the workbooks for free and work through the lessons. Download the workbooks here:
http://www.keizerbernina.com/my-bernina-workbooks.htm
Hope you enjoy it!