I am looking to buy a hybrid bike that I will mainly use for commuting (typically <2-3 miles each way), fitness, and riding around town. I'll be riding mostly on paved roads, and perhaps a few gravel paths or light trails (probably very few). I would also like to be able to use this bike for fitness and take it on semi-decent road rides and use it as a bad weather bike instead of my road bike. I don't have a lot to spend (<$200, and ideally <$150) so my options are limited by budget. These are 3 that I have found on craigslist and I would really appreciate any input on which of these bikes might be best for me, and which are good vs bad deals. Thanks!

1) Womens Schwinn Crisscrosss (year unknown) - $150
http://raleigh.craigslist.org/bik/2426084288.html

2) 2000 Cannondale M300 with new Bontrager Hybrid tires - asking $185
http://raleigh.craigslist.org/bik/2436517168.html

3) Diamondback Insight 1 Hybrid - asking $150
http://raleigh.craigslist.org/bik/2439688041.html