This isn't exactly in North Jersey, but... When I was looking for a bike a few weeks ago, I stopped by this place called Padi's Pedal Power on Fischer Blvd in Toms River that had some used bikes in front of the store. Maybe you could call to see if they have anything you might be looking for before you make a trip down there since you're in North Jersey. Their website with their info is http://www.padispedalpower.com