I went to my local Goodwill and on the bottom shelf was the 'yellow' straw case! Picked it up, sat it on the buggy and opened it. A 306K Singer, with everything there. No attachments, but had all the cords and a bobbin case. I paid 17.50 for it and got it to the truck just as it started to rain. LOL Although..I almost broke my arm when I first started to pick it up! Didn't know those things weigh 25LBS!! Cleaned up great and with the proper needle, sew like a dream. Got lucky and found some cams for it, but haven't tried them yet.
So keep looking, you will find a great deal one of these days.