The 650 had many upgrades in 2012, so IMHO it would be a plus to get a newer one, although many do just fine on the earlier models. I sold a 2013 this past summer for $5k. I think around 5K miles, lots of good farkles (including new fork springs), and absolutely like-new condition. You don't say where you are and we have no details, but I think that 2011 is WAY overpriced, maybe by around $2K.
2014 V-Strom 1000 - Desert Khaki
2011 Burgman 400
2007 Honda Helix
2013 V-Strom 650 - sold