I've been riding a Diamondback Trace hybrid since last Spring and it's been good for casual rides/pulling a child bike trailer/shorter rides but would like to pick up something with a little lighter that can achieve greater speed for road biking. I don't want to spend a lot so second hand is preferred. I'm hoping to find something decent that I don't have to sink a lot of money into. I know it makes it harder for suggestions since I'm looking in the used market but any input is appreciated.

What do you guys think of this:

http://indianapolis.craigslist.org/bik/4415777867.html

It looks to be a 2013 Felt Z100 but the price seems a little too good to be true...