Convenience - There are over 5,000 airports in the US that private planes can use (vs 500 airports for larger commercial aircraft). This means you can often land closer to your true destination. In the summer of 2006 the ban on liquids caused all sorts of inconveniences for people flying commercially, but private flyers avoided all this. Private planes also mean that you can travel with your special belongings such as instruments, sports gear, product samples or bring your pet in the cabin.
Business airliner can be contracted as bizliner. Airliners converted into business jets are used by sports teams or VIPs with a large entourage or press corps. Such airplanes can face operational restrictions based on runway length or local noise restrictions. They can be the most expensive type of private jet as they provide the greatest space and capabilities.
On 1 April 2017, there were 22,368 business jets in the worldwide fleet, of which 11.2% were for sale. 5-year old aircraft residual value level is at a 56% of the list price. A new business aircraft depreciate by 50% in five years before depreciation flattens between years 10 and 15, and the owner of a 15 to 20 years old is often the last, matching luxury cars.