150$ live tourney. 157 people 17 paid . 15 left probably in about 5th. Me in SB and Button are leaders at the table but only like 21 Big blinds. Blinds at 6,000 12,000 ate 1k. 250,000 effective. I have seen him raise fold a couple times and he always opens over 3x. Folds to button he raises to 40,000 and I have 33...

I'd fold.

At best your hand is 50-50 against any opponent's range and if he/she has a pair, you're dominated. You're not getting the right price for flatting and set mining at this stage.

The fact that your opponent has folded to a re-reraise multiple times previously doesn't mean it's going to happen in this spot and with 21BB remaining, you stand to see better hands to make a move with.

I'm imagining if you bust at this stage, a min cash is about $300 and 1st prize is close to $5K.

21 big blinds effective you need to keep winning a lot of chips to stay in the tournament and these chips might be the easiest to get. You need to see a chipup plan, which does not involve getting decent hands to skip this spot. In general evenstacked spots suggest at least as wide reshoving range than normal spots since villain will be the one with ICM pressure and F2T has future game implications that usually make up for theoretical ICM problems. There is not nearly enough information to guess villains opening range or calling range and also villains opening frequency affects our future stealing opportunities. Only reason to skip this spot would be that villain is tight (very tight 25% button opening range still mostly folds vs. reraise so tight players bet-fold all day, knowing villain has bet-folded few times is not that big of a read) and that players after you are tight, so you would actually have chip printing machine in open raising situations.