luvb2b model isnt meant to be used for forward PE. it's used to prove Tesla is at a starting point of profitability and no longer losing money or going bankruptcy. and let's not forget that the large number of shorts in Tesla right now believe in this bankruptcy thesis.
In addition, applying a PE of 20 is a very poor measurement of Tesla valuation at best. This is what the short trolls have been using to compare to GM/Ford. Try using growth instead, that's how the stock price is measured at present stage and rightly so. I don't have the data offhand but according to
this site, Tesla has been growing revenue of 266% per year on average. With GF3 in china, high demand cars, a huge line of future products, growth rate should keep going. This growth is what Tesla valuation is based on and it is therefore, cheap at this price.
Let's not also forget that only some weeks ago, Saudi investors and some other automakers were willing to pay $420/share, not for a 20 PE, but for the future growth and cash generation (and some other reasons). This is almost 40% fire sale. Once this blows over, the stock should come back to the norm in the $300ish.
Happy shopping!