a bike is worth what you can sell it for. look for similar bikes in similar condition on craigslit. I wouldn't get my hopes up unless someone really wants old bikes. usually a "flipper" will buy low, refurb & sell for $100. the last time I bought an old bike like that I was despearte for a weekend project & any road bike my size. drove to a nearby state for a bike listed for $25. wound up giving him $20 cuz it was a long drive. he was annoyed but agreed. I refurbed it & got some commuting use out of it. after a while I sold it for $100 to a parent who wanted a bike for his kids college transport knowing it would be left outside & abused
you might just donate them to a nearby bike co-op