The headline numbers are also just... I don't feel like I deserve it to be honest, even though most people I talk to say, "this is what your life's been leading to."
If you don't value yourself at what you're worth, no one else will either. These folks don't know the real you, that's their paper valuation. If in your mind you're saying "If they actually knew me they wouldn't offer me this much" then you're defeating yourself. Who cares if that's reality?! You get a paycheck for X amount of time before "the jig is up." Unless your job you're at now is that amazing, then the only thing that's really holding you back is the fear of being "outted" as not actually worth it. Which doesn't seem reasonable if this really is what your life has been leading to.
I get where you're coming from. I also have problems undervaluing myself (anxiety, imposter syndrome in tech, the usual.) Then again, I've never had someone come to me and say I'm worth more than I actually think I am.
Here's some food for thought: I went to Europe a good while back and met a dude. Easy going, free spirit, had a side gig of making hats.
I asked him what he did, ya know, the rest of the time to make money.
He'd go to different businesses, talk himself up as a corporate exec for logistics or marketing or w/e, work there for about a year until he could collect severance, then he would just quit, enjoy his money and think about the next thing he was going to do.
I'm not going to say that strategy is a pathway to success. But I had to admire the fact that he honestly just didn't give a fuck. He didn't feel beholden to these businesses, he didn't beat himself up or question his own worth. He put his value first, and fuck everyone else. I wouldn't do other businesses dirty like that, but the way he didn't carry any real guilt about it really struck me. Imagine if you were principled and skilled......and had that kind of self-confidence. How much less time you'd waste beating yourself up, accepting less than you're worth and actively sabotaging your chances at things being different.
Maybe that helps, maybe it doesn't. But if the only hang up you have right now is that you don't think you're actually worth what you're being offered.....get over it
If it doesn't work out it's not the end of the world for you or them, and it might be the greatest adventure of your professional life!