I also have the 8900 and it's wonderful. for servicing, the local quilt store employees told me that they (or someone they know) come to Anchorage once or twice a year to shop for fabric. We have a great Janome dealer here who might be able to service your machine when they come over, if you schedule such a visit. You might just want to visit Anchorage yourself to check out our great quilt shops.
The price you've been offered is great - hope you don't pass it up unless there's a problem with the machine, of course.