If it is a 237 you can't go wrong. It was definitely the last Singer built with all metal innards. The satin stitch is to die for, probably the prettiest satin stitch I have ever seen any machine make. 30.00 is a steal. Another cool thing about the 237 - which is making the prices climb - is that it can easily be converted to a treadle just by removing the motor belt and putting a treadle belt on the machine. It will fit right in a Singer treadle cabinet so you would have a zigzag treadle machine with the prettiest satin stitch ever.