What it looks like you have is a 60's Kenmore and a singer 66, which appears to be refurbed from a treadle to an electric. I'm no expert, but they are not likely to bring much, if any money. Neither is old enough to be rare. Neither is a collectable model (a very few models are collectable). You might try selling them on Craigslist or donating and taking the deduction.
bkay