After looking at the bikes this morning, I decided to pass on them.
The bikes were in good shape, and the seller was a nice retired lady. But, I don't have a need for a mountain bike and don't feel I could sell them around here for much more than the $75 asking price.
I see that the seller took my advice and, except for her advertisement title, reposted the bikes with a more accurate description, too.
http://kalamazoo.craigslist.org/bik/1373475480.html