Check pricing with Dave Smith Motors, Kellogg, ID. Fly in to Spokane, and their shuttle will pick you up and take you to the dealership, about 40 min. away. Conduct the transaction, then enjoy the beautiful scenery on the way back to AZ - either through Missoula, or through Lewiston. If you go through Lewiston, the Jack O'Connor Hunting Heritage and Education Center is a must-see for anyone who is remotely interested in hunting, fine guns, world-class taxidermy, and some of the memorabilia of the Dean of Outdoor Writers.
Last but not least, you can stop at the casinos on the way home (Jackpot, Wells, Ely, Las Vegas).