I believe the formula is the same for all high end BMW's. In the first year, you lose $20k. The owner paid list of $89,995 then traded it back for about $69,900. He or she then would realize sale tax advantage of $4-5K toward the replacement vehicle. The dealer resells for about $79,995 etc. This particular X6M is not heavily optioned and the color combo is questionable to many. The same holds true for the X5M. I bet the numbers are very close to this scenario. In 3 years, the $100k XM5's and XM6's will wholesale in the high fifties. This is an expensive sport!!!