If you have no investors to answer to and very little debt, then there is no number. But here are some factors in play:

-Do you still believe in your idea to the extent you want to grind it out and see some serious upside?

-If there is serious upside potential and you want to bake that into the price to still see a nice reward then do that.

-If you're okay with not pushing through on this startup and realize it's not going to take off (or likelihood is low) AND you want to work for this company, be happy taking some lower multiple on your salary. $1MM per employee is probably a high amount if you have no revenue or customers or investors, but if you don't care about losing out on $200K, then shoot for the moon and negotiate as hard as you can.