Your argument is principled but not very pragmatic.
When a potential employer gives you anything they consider "significant" equity (ie, worth mentioning as a major part of your comp plan), they are implicitly discounting your salary to make up for it. If you accept their offer, you have given them salary flexibility without receiving consideration.
In reality, information is very much something that negotiating parties exchange. But, I agree that you should reasonably expect enough information to value your equity if equity is a major part of your comp. All I'm really saying is, make it clear to your counterparty that the lack of information about your equity is raising your negotiating floor. Which, logically, it must.
But I am also specifically not saying, "offer 5k off your salary in exchange for valuation information".
When a potential employer gives you anything they consider "significant" equity (ie, worth mentioning as a major part of your comp plan), they are implicitly discounting your salary to make up for it. If you accept their offer, you have given them salary flexibility without receiving consideration.
In reality, information is very much something that negotiating parties exchange. But, I agree that you should reasonably expect enough information to value your equity if equity is a major part of your comp. All I'm really saying is, make it clear to your counterparty that the lack of information about your equity is raising your negotiating floor. Which, logically, it must.
But I am also specifically not saying, "offer 5k off your salary in exchange for valuation information".