You may want to check your local Viking dealer. I went last week (bought a new machine, Mega Quilter) but there are many people to trade up all the time. Our local dealer had a expensive machine with all the bells and hoops for $600, it was worth $2000 with the software and hoops.
It had 10 hours and was like 5 yrs old.
and your local dealer will give you some sort a warranty.
thats important to me as a quilter.
I have 4 machines.
Gammill~ wonderful service and warranty (purchase 2010)
Viking Mega~ 10 yr warranty (bought new last week)
Bernina~is 7 yr old and our of warranty, put in a new board already. Alex Anderson Quilter
Old double needle industrial... probably 30 plus yrs old. works great.
A couple other odds and ends.
I'm liking my new Viking, which is meant for a short arm.
I wanted it because, no computer, straight stitch only, feed dogs are covered by the foot, so a nice even feed. Cutter, knee lift.
Know what you want, a dealer may help you see all the machines out there.