Carol, I would gladly use almost any old Singer for piecing and the only one that I wouldn't use for quilting is a featherweight because the throat space is too small. I do quilt on a longarm Tin Lizzie, piece on a 1940 Singer Featherweight and do my binding on a Singer 301. There are so many for sale at cheap prices locally that I would probably hesitate to spend much online unless it is in super condition. There are Yahoo groups for the vintage Singers, all of them are wonderful sources of information and parts if you need them. I have seen very cheap 201s, 15s etc. On Craigslist. At least Craigslist is local and you can see the item before you pay. Keep the oldies clean, lubed, oiled and the will go forever. :-D Mary
PS: No you can't have too many, it's an illness like quilting.