I haven't recieved an offer like this but I've heard of them especially in start-ups. I like the idea of working for a start-up and am applying for software development positions in a few.
So lets say I think a company is going to do well, and they're willing to pay me $10,000 less than market value in salary but speculatively over-compensate for that value with a stock offering they claim will be worth $X more than the $10K I'm missing out on in 3 years. Over those years I'm missing out on $30K though so presumably they'd have to include a comparable stock offerring in each year's salary at least until they can afford to pay market price.
As a young person inexperienced with stocks, what factors can I look at to determine if that claimed future value is even remotely plausible? I know it's very speculative, but how could I make sure we're even in the ballpark?