I've not tried this machine BUT the only thing that worries me is LIMITED WARRANTY. Before plunking down the dollars I would ask to see a copy of the warranty, read it and ask the owner to explain it to me. Then ask questions of:
How often does it need service?
Where can I have it serviced?
How much is servicing?
How expensive it is when a belt breaks?
What type of needles does it use?
Where can I purchase the needles?
How expensive are the needles?
Can I re-time the machine myself?
Am I limited on the types of threads I can use?
What kind of "home maintenance" is required?
How often do I do "home maintenance"?
What kind of "after" support comes with the machine?
Does the warranty have an "hour limit" built in?
Does the machine have to be on a surge protector or UPS?
If the machine has to be shipped back to the factory who pays for the shipping?
I don't mean to be a downer, but any one of these questions can make or break a warranty. I am just speaking from personal experience as well as a former business owner. These are things you need to be aware of before making your purchase.