Heavy Equipment, Construction - All Related Items, Asphalt, Concrete & Crushing Plants - 40+ Years Experience..Our Certified Senior Appraiser, Mark Hockaday, has been in the construction industry for over 40 years. His experience includes buying and selling thousands of construction items (including new and used equipment, as well as various plants), setting up of Asphalt, Concrete and Crushing Plants, attending hundreds of heavy equipment auctions, as well as owning and operating various websites designed for auctioning, appraising, and brokering of heavy equipment, plants, and other construction-related items.