I have an old 830.. This 810 is like a little sister.. A bit smaller machine, but nearly the same machine without quite as many stitch options and such. My old Bernina has sewn a million miles and is still going strong, I love a Bernina. That's probably why I think it's worth the effort. I saw that I can order the service manual for $12..
I agree with K9dancer that the money would be better spent on a terrific old machine's repair than on a new plastic junk machine.