The skies are clear and the temperatures perfect as Arizona Auction kicks into another gear heading into the weekend. It's preview day for RM Sotheby's at the Arizona Biltmore for their 23rd annual Arizona sale.Returning to the Biltmore after a one year hiatus, the 78-lot docket for RM's Arizona sale...

The Dallara DW12 IndyCar oval chassis Ryan Hunter-Reay drove to victory at Indianapolis in 2014, and will race for the next three seasons, is part of an unprecedented auction being led by the Andretti Autosport team this month in Arizona.RHR's No. 28 DHL Honda chassis will go under the gavel...