Once you've got a price quote, it's worth the effort to call around and get three or four other quotes. Prices vary widely, and one of the most important things to know is that you will often be paying for the plane to get to you, also known as the repositioning fee. Additional charges, common to a lot of flights, include airport charges. At New Jersey's Teterboro, it's $100, while some airports with higher density have an added fee. There are also takeoff fees to consider.

Charter, also called air taxi or ad-hoc flights require certification from the associated country's regulating body such as the FAA in the U.S. The regulations are differentiated from typical commercial/passenger service by offering a non-scheduled service. In the U.S. these flights are regulated under FAA Part 135[1]. There are some cases where a charter operator can sell scheduled flights, but only in limited quantities[2].
Because jet charter is not priced on a per person or ticket basis, it is not likely that it would be more cost effective for a group of 10-15 individuals to charter a jet compared with flying via scheduled airline service in coach or first class. Even if the total cost for a charter trip is split among 10 people, the cost each person would cover would still be significant.
At 102 in (259 cm), the G650ER has the widest cabin yet but should be joined by the Falcon 5X (a Global 5000/G500 competitor) and its replacement, and the 4,500 nmi (8,300 km) Citation Hemisphere in 2021; at 98 in (249 cm), the Global 7000/8000 is wider than the 95 in (241 cm) Global 5000/6000, the same as the Gulfstream G500/G600 and the Canadair Challenger, while the Dassault Falcon 8X is 92 in (234 cm) wide and the G450/G550 88 in (224 cm).[2]
Another important factor Fazal-Karim suggests considering is the length of time you plan to own a plane. He says the average period of ownership is one decade, and typical depreciation in aircraft value drops about 10 percent to 15 percent in the first year with a further 10 percent each subsequent year. Due to low inventory and high demand for pre-owned aircraft, the Jetcraft Market Forecast predicts depreciation rates will improve over the next 10 years. Jetcraft
On 1 April 2017, there were 22,368 business jets in the worldwide fleet, of which 11.2% were for sale.[5] 5-year old aircraft residual value level is at a 56% of the list price.[6] 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.[7]