I agree that you probably shouldn't include stock that can't be sold. There's gotta be a middle ground though, because if you're at a big established tech company with a senior-ish role, your comp is like nearing or exceeding 50% bonus&stock, which you can liquidate on the spot and turn into actual cash.
So if you take someone whose base salary is 180k at whatever big tech, you're missing the part where they actually make >300k/yr in cash.