Adams is a superstar in his own mind, and by the NY media, but on the actual football field it does not show.
The trade for Tunsil was not great because he was nowhere near the player OBJ is and he was basically overpaying just to get a guy who can fill a void. That was not the worst trade possible for BOB, it was just dumb given that they traded a lot to also get a new WR when they already had a better one on the roster before giving him away for nothing (if he had simply let it be known Hopkins was on the market he could get 2 1s for him as well and suddenly the Tunsil trade looks better).
EVERY NFL GM knows OLine are the backbone of the team. There are probably at least 20 teams that would start OBJ at LT right now (and I am being conservative). So you have a more valuable player, at a historically more valued position and you want to argue his trade value is lower? That does not really add up.
Mostly because I think you're basing that off something that doesn't exist any more.
I DON'T think NFL teams consider Oline as the backbone of the team. I think NFL GM's have realized you can structure offenses to get the ball out quicker, which both negates a pass rush and negates the need for an elite pass blocking unit, and they've realized that offensive line play coming out of college is so poor that this notion they're going to build a like Cowboys 5 years ago level Oline just isn't realistic in this day in the NFL. I think offensive line is important, but I think if you look around the league, you're going to find a very mixed bag of good teams who both do and don't prioritize the offensive line, and much of it is dependent on what type of QB they have and what type of offense they run.
I don't think KC prioritizes offensive line. I know Seattle doesn't. I know the Rams don't. I don't think Buffalo does. I'd say the Ravens are in the middle in terms of how they prioritize it.
Yet Green Bay does. Indianapolis does. New Orleans does.
There's no universal truth in any regards to how winning teams construct Olines. I said it back in the Flacco-era, and its certainly true now. I don't think you need a great Oline to win SB's. I think you just can't have a bad one. It's basically like special teams. You don't have to dominate in it. You just can't suck at it. And I think that's how most teams view Oline play in 2021. Just don't suck at it.
As for what I think Brown's trade value could be, I'm indifferent. For starters, I don't think we trade him, nor do I think we should trade him. So for me, its a moot point.
As for what we could get for him, all the "comps" we are provided are either Tunsil, or crossing positions, and crossing position argument really won't hold up. No GM is going to say "well Brown is comparable to Adams in terms of how they arbitrarily "rank" in a position group", so I'll get up that price tag. It's unlikely to work that way in real life. Tunsil may be a decent comp, but that implies you'll get a dumb team like Houston to pay that price. Not impossible, but its not like every team in the league will bend over to give us whatever we want for him. That's also especially true when everybody in the league knows they can just wait less than a year and see this guy on the open market.
I would be shocked to hear of a multiple first round pick offer. I wouldn't be shocked to hear of a first round pick + maybe a sweetner or two offers.