Shirley,
We paid a bit more than that for our 401A that came without a case top. It runs nice and does indeed sew a straight line.
It has a built in cam stack that in my opinion, (an opinion not shared by others such as my wife) produces better patterns than the top hat cams. And we have a bunch of cams to use in it too.
My only concern is that it doesn't have as much room under the harp as some of the other machines do. If this is not a concern, I don't see why you couldn't quilt with it.
Our only cam with the ZZ needle plate too. We've got a bunch of other bits from our LSMG and so far no SS needle plate.
Did you get a good deal, I think so.
Joe