Velodyne recently announced a new laser scanner – the HDL-32E. According to the firm’s President, Bruce Hall this new unit is the result of customer requests for a smaller, less expensive, scaled down version of their lidar sensor technology . Instead of 64 lasers the new unit has 32, and at $29,900 (US) the price has been cut in half.
This video provides an excellent product overview. Some of the interesting capabilities include a built-in IMU, ability to sync with an external GPS and wave form capture with one of the lasers.
For many mobile applications this is a very cost effective LiDAR sensor.