Singer 301a, 1951, Black, good condition, with bobbin carrier & 1 bobbin, no attachments, no case, no cord or foot controller, eBay auction, January 2011, $65 plus shipping.
Elna Supermatic, good condition, with case & cord, no attachments, no knee control, eBay auction, 2010, $35 + shipping
Western Electric 1917 in bentwood case, with cord (needs rewiring) & foot control, very good condition, with bobbin case & bobbin, eBay auction Feb 2011, $32 + shipping
Singer 99, 1928, in bentwood case, good condition, with cord, with bobbin case & bobbin, no knee bar, no extra attachments, Shopgoodwill.com auction, March 2011, $40 + shipping
Singer 66-1 w/Lotus decals, 1909, very good condition, with modern motor & case, with bobbin case & bobbin, with extra feet/attachments, Shopgoodwill.com auction, June 2011, $101 + shipping.
Singer 221 Featherweight, 1957, good condition, with case, with bobbin case & 4 bobbins, with cord & foot controller in like new condition, no extra attachments, local antique mall, July 2011, $225.
We don't have many good machines here locally, since we are somewhat geographically isolated in central valley of California. So I get most of mine by auctions.