It would be ideal if Tesla would report on the Model 3 backlog of people that have reservations but they won't provide that data, all we have is the reservation estimator. If you look to sell your car when there is ~6 months minimum wait tile for a new Model 3, you should be able to limit the depreciation. Once Tesla can start supplying the market to its demand like the Model S/X, the depreciation will be like any other Tesla.