I have had a Pfaff Ambition 1.0 for about a year and a hlaf and just love it. I paid about $800 from a show. It has not needed any servicing. The IDT alone is worth the price. Fabric feeds nice and straight.
The only items I bought was a single hole plate and a quarter inch foot with the fence on the side.
This is my second Pfaff. My other is a 2148 (I think).