I love the Trek Dual Sport bikes, but unless you can find a place to get ahold of 2012 or later models the prices will be a tad pricey in the range of $550.
But it is always worth asking about getting older models, my bike was $4,200 but since I found a year later model I got it for half that and ended up cracking my frame 4 months later and ended up with the new model.
http://www.trekbikes.com/us/en/bikes/town/dual_sport/