Earlier quoted context omitted.
> the 409a is only going to show you the maximum possible value While the points about uncertainty of options are quite accurate, this detail isn’t really true. For the most part a 409a is the lowest reasonable valuation the company could talk the auditors into accepting. The lower it is the less tax paid and everyone knows that.
You're correct about valuation, but the parent post was meant to address "how much liquid dollars should you expect to receive vs. 409a." You are likely to receive less in most cases (read: unless there are wildly successful public liquidity events) due to liquidation preferences.
(In my experience, the 409a is on the order of 20% of the most recent raise, and preference is not more than 50%, in my area. And obviously you hope to sell for more than the last raise!).