I got my Bernina 630 on E-Bay just over 2 years ago. I was scared to death but it all worked out great. The seller of mine was some lady who had barely used it, not at all on the embroidery unit, who took it to one of those "I Sold It" Stores.
It was boxed in the original box inside another padded box and came with no damage. I think it came by Fed Ex too. It is a great machine and I got it at for a lot less than buying a new one.
Since mine is a used machine, I do not have a warrenty on it. I do have a Bernina dealer about a mile from my house and have it cleaned and checked on there.