That's a nice price for a sit down quilting machine with a table.
My only reservation about the Tin Lizzy is the shallow depth of the harp space, it's only 6". Most Tin Lizzy machines seem shallow to me. That 6" is going to come into play when you try to smash a King size quilt into the harp. But ... it's a darn good price for a sit down quilting machine, perhaps good enough to overcome the shallow harp.
You really need to sit down and try it if you can. I would advise bringing a finished quilt with you - the largest size you expect to make. Even though the quilt is finished, go ahead and put it in the machine to try to maneuver it around (take the needle out of the machine to ensure no mistakes!!). You're testing maneuverability here ... not stitching. Of course you will want to test the stitching as well ... test everything you can throw at it.