It is hard to place a value on Archer Aviation (NYSE: ACHR) because it is a money-losing start-up. Archer Aviation has come a long way since then, so you could easily argue the stock is cheap. Archer Aviation has an exciting technologyThe big story with Archer Aviation is its electric vertical take-off and landing (eVTOL) aircraft. If you can envision a world where Midnight and Thunder aircraft are zipping through the air, it might be cheap enough for you to buy. After the company's eVTOL aircraft are approved, it will still have to spend significant sums to ramp up production.