Prospective aircraft buyers often look for private jets for sale by searching Google, gathering information on various makes & models and their performance characteristics, and on condition, age, price and other information about specific jets for sale. Most private airplane buyers use standard phrases like: "private jets for sale", "private jets on sale" or "private jets on market" for their search. Some prefer more specific terms that may include a manufacturer’s name along with the aircraft model number, and configuration features such as a particular upgraded avionics package. Searching for aircraft for sale online using very specific terms may miss some listings due to variations in identification, for example “Gulfstream G550” vs. “Gulfstream G-550.” More inclusive searches, such as “Gulfstream, large-cabin jet” yield more results.
Though the early Lockheed Jetstar had four, most production business jets have two jet engines, mostly rear-mounted podded engine. If mounted below their low wing, it wouldn't allow sufficient engine clearance without a too long landing gear. The HondaJet is the exception with its over the wing engine pods. Dassault Falcon still builds three-engine models derived from the Falcon 50, and the very light jet market has seen several single-engine design concepts and the introduction of the Cirrus Vision SF50 in 2016.