I did ask the seller if I could have it checked out first and she agreed at first, though now seems to be saying that I have to decide after I test drive it. But she might just be getting annoyed because of my hesitance. I suppose I could always pay a repair guy to go with me to look at it...
If I can't find someone to look at it with me -- I don't happen to know anyone, though I will ask around -- if it sews well when I try it, does that mean that it will be smooth sailing? Anything I should look for? Any questions I should ask?
The machine comes as a package deal with a GMQ Pro and a quilter's cruise control (not sure I need that, but it is an all or nothing deal).