T.M.
You can post then on Craigslist but be VERY careful. Always meet in a public place and have a buddy with you. I would also post on this site. There is tons of traffic on this website and many mothers who are having or know someone who who is having a baby and needs baby stuff. :0)
I would take them to Kid to Kid in Santa Clara or The Shoppe in San Jose. They buy and sale everything.