I don't know what a fair price would be. I recently removed my Pfaff Grandquilter from it's frame and decided to use it as a workhorse for quilting with a walking foot and for FMQ. It is also great for straight stitching. It has a larger throat space than my Bernina, but I has only about 4-5 inches of room for quilting. I was completely fed up with its lack of throat space. If you want to put another machine on your frame, I would save up and get one with a larger throat space. By the way, I purchased my Pfaff and its frame for $1,000 about 7 years ago used. I would search out used machines. If you have a local quilt guild, someone might have one gathering dust.