I purchased a Model S less than 8 months ago and my Model S is a 100D with about 8k miles.. I have since purchased a Model 3 as I love the Tesla product. We don't really need three sedans, so I have given consideration to the Model X. I contacted Tesla for a trade in value. Tesla quoted 15% below the average Kelly blue book value and 36% below the original MSRP. When I was purchasing the Tesla, they taught-ed that depreciation at 50k miles was roughly 28% and was number one in the industry, well that ship has sailed since the launch of the Model. It is evident that due to the Model 3 the value on the Model S is evaporating on a monthly basis. The Model 3 is going to continue to crush the value of Model S and I would anticipate a sharp drop in MSRP, probably in the neighborhood of $15k to $20k, especially considering the tax break is about to be reduced If anyone outside of Tesla is reading. Be patient and look for the CPO cars. Purchasing a new Tesla 100D does not appear to be a wise decision at this time. The difference between AP 1.0 and AP 2.0, AP 2.5 with EAP is really not that much.