Jets for sale don't always show even an asking price, and sold prices are almost always confidential. Best bet is a bit of extrapolation from the Bluebook prices and asking prices online. You can see a free jet bluebook price for most of the popular private and corporate jets for sale at
www.jetliste.com , or for more detail use the price digest at
www.aircraftbluebook.com or vref at
www.vrefpub.com - both are more detailed but run $200 to $300 per year for the books.