By Dennis Rousseau, founder and president of AircraftPost.com. This article was originally published in the Aircraft Bluebook Marketline Fall 2015 edition. In 2006, the average cost new for a Pro Line 4 equipped Lear 60 was ~$12.5M. In 2007 the Lear 60XR entered service with the Pro Line 21 avionics and an average cost new of […]