Any interest in including Japanese market cars sold stateside within your dataset? There are lots of thoughts on how these vehicles are valued, but not a ton of data points. BaT probably already has a few to add.
UPDATE AS OF 11/28/18: Please refer to the live-updated "NSX Valuation Document" (https://docs.google.com/spreadsheet...giPanuhIfiHDIcsmwfqBxOUZJb_-WUwbcHb7L/pubhtml) for all market insight including value, appreciation, and listing prices.