bkay is correct that the machines won't make you rich but there may be someone in your area that would want them. The Kenmore won't get you much even though they're good sturdy machines. The Singer isn't a refurbished treadle, it's a crinkle finish 1950s model, not a valuable collectors item but a good machine. The coffin top over the Kenmore belongs to that treadle cabinet, which was probably removed from the treadle base to make it into the table. I think, and I'm sure everyone here will agree, that you should return the cabinet to the base it belongs to, and offer it on CL. There's always someone in need of a base for a treadle machine. Please don't let it go to someone who wants to "upcycle" it.
Cari