The Excel line provides some of the best-selling business jets ever produced. Cessna combined great economics with a stand-up cabin for a big aircraft feel. Retaining the straight wing allows excellent short field performance and a reasonably fast cruise speed up to 45,000 feet. Operating costs are low compared to competitor models. Auxiliary power units (APUs) are optional on early models and standard for recent units. The 560XL series requires 2 pilots, and the cockpit options are a Honeywell or Collins Proline 21 suite on the XLS+. There’s an STC available for a Garmin G5000 retrofit on Excels and XLSs. Prices have traditionally been stable as demand is high, although Excel prices have been inching down. This plane is a staple in many fractional ownership fleets. You can learn more from the Textron Aviation XLS+ site.