well first off , I would say don't sell them ride them.
but if you insist, post some pictures here and we can identify what they are and possibly a value range.
if you look on the top of the forum page you will see a post called "how to upload a photo"
There may be someone on here interested in buying, it doesn't hurt to ask. most likely the other members
are like me and already have more bikes then they can afford, it is a sickness.
Craigslist is probably the way to go. I've sold a few bikes on there. I do several adds on the closest cities to me,
Cincinnati, Columbus, Louisville, Lexington, Indianapolis. Beware of scammers, if someone sends you a message
and it sounds like a robot wrote it or has very bad English, it's probably a scam, or if the message is very vague, like "I'm interested in your item, please give me your number"
don't
good luck