I have someone who is offering a Cannondale CAAD12 for about $900 used only a couple times. I was seriously considering a road bike but am new to this whole riding thing. I bought a trainer 3 weeks ago and have been using my mountain bike on it but would love to use a road bike instead. I don't know what model this CAAD12 is and neither does the owner. Assuming it's functional and doesn't have any problems, can anyone tell me based on these pics if it is a good deal and what model?

I was measured at a store a few weeks and the guy told me I would fit best on a 58 or 60 frame.
Thanks for looking!

Craigslist Link for better pics

Screenshot_20170102-231621.jpg

Screenshot_20170102-231838.jpg