I bought a pristine, unscratched, mechanically perfect Pfaff 130 with all attachments, a hand crank conversion kit, bobbins, etc. from a collector and paid about $330 for it five years ago. It is still unscratched. I do use it, but not with pins. It free motion quilts like a dream.
Don't try bobbin work with it (where you use a different thread in the bobbin and sew upside down on the work). Ask me how I know!
Spare parts were destroyed by the company some years ago and are hard to find. The timing belt is the most critical item.