Pfaffs are great when in working order. Just be sure that there is a Pfaff dealer, or a dealer who handles Pfaffs, near you. If not, it is very hard to get one repaired. I have a 7550 bought new that has not has hard use and the board went out renderign it unusable. If the dealer near you is not interested in Pfaff machine repairs - woo.
Pfaff or the company who purchased them stopped making the boards for the 7550 and I am sure some others and you have to find someone who can rework the board. Good luck. missbelle