Unfortunately, not everyone is as honest as we are. Many times on E-Bay, people say it works if the wheel turns. They just don't understand machines. I would try to get an owners manual on line (they are usually not too expensive). Here is one I found on E-Bay
http://www.ebay.com/itm/Singer-Sewin...7#ht_26wt_1041 Many times you can figure it out from the manual. Also, if you belong to a guild, many times someone's hubby or brother loves to tinker with machines and will do it cheap. Good luck.