ITA ... why are they getting rid of it?
Separate from who is selling it, I'd do my own research and find out if there is anyone local who will service it and provide support as I get to know it. Perhaps even the ability to receive paid lessons on the machine.
I hesitate on used for most anything (not just sewing machines) .. dealers tend not to want to give that extra customer service and support that IMHO are vital. Plus often the servicing is second in line behind machines they have sold. Add to that, there's no guarantee/warranty to fall back on, if things go wrong.
You didn't mention whether this was a private sale or a retailer selling it as used, which could make a difference. If a dealer, will they give you a guarantee period, to show they are standing behind what they are selling.