Some people use this, but there's not much listed. https://ev-cpo.com/Is there a CPO / Inventory website for Tesla owned vehicles? I have free supercharging on My Models S, anyway to get that on a new vehicle?
Also how can I check the options on a Carmax vehicle? Looking for FSD, no idea how I validate.
With the tax credits, have you considered grabbing an M3P? Pretty close to the same performance as an MSLR, but less than 50% the cost, albeit at the expense of cheaper materials.