I have this Pfaff Grand Quilter, Inspira 10 foot table, and the Cruise Control stitch regulator. All purchased for around $2500 in 2006 - the stitch regulator alone was $500. I've quilted 40 or more of my own quilts on it, all from twin to mostly queen and a few king size. I find it too much time and effort to put anything smaller than a twin size on the rails. It's much quicker to quilt smaller things on my other Pfaff QE 4.0.
This set up has been really nice to have, but I hope to upgrade to a longarm next year with a 12 foot table. Seems like everyone I know has king size beds, and I really have to work with the monsters to fit on this 10 foot table. Either do the quilting before adding borders, or fold the borders in.
The sewing machine is a good one too. I don't remember when Pfaff quit making them in Germany but you are really lucky if that one was. Mine was made in Taiwan, but I have never had a problem with it.
If the price is reasonable go for it - Good Luck!!!