I have the 530 and many other vintage Bernina models. I think 8 or 9 others? I've lost track on purpose. LOL. Mine has been adapted to use a foot pedal instead of the knee control. It's a lovely machine and I'm very happy with it. If it has the case, the tiered tray that fits on the back, the cords etc. it's a decent price. However, if the case or tiered tray is missing, I'd offer less.