Auction week in Scottsdale. One of the highlights of Scottsdale auction week is the sale to the highest bidder of a 1930 Duesenberg Model J, which sold for $2,640,000. this unique disappearing top, Supercharged 420 CID 8-cylinder engine convertible Duesenberg was expected to bring $1.6M to $2.2M, imagine it going for an extra $400k more than the estimated value. This is the type o sale that makes determining the appraised value of this type of car so difficult.