So a 60D to 75D upgrade is 41 rated miles for $6,500 (and a relatively meaningless top speed increase of 10mph). The 90D to 100D upgrade is 41 rated miles for $3,000. Seems like they should reprice the 75D upgrade. I'm sure a lot more people would buy it at 3k plus the 500 change fee. That all said, I get that they are pricing the 60 down to get more buyers in the entry segment. Just makes for an interesting comparison. Either way, 6,500 (plus 500) for 41 miles is a lot.