You do get a lot of females on craigslist who are selling bikes that their bf's/husbands bought for them in an effort to get them to ride with them - and they never got into it. So they don't necessarily have a clue about any of the componentry on the bike. I think a bike thief with a cannondale hoping to get a good price for it - would know what the components are.

but ask her why she is selling it.