Pfaff machines are great machines. My friend has been using hers for 60 years. Nothing has ever gone wrong with it and she has only had routine maintenance done to it. It was a present from her husband when they were first married, he wanted her to have the very best so it would last and it has. The funny part - though, I swear it weighs more than she does.
Enjoy your machine. You certainly got a bargain!