$1 - 300/600 BvB - 45er endgame - 24o - How To Evaluate This Flop?

[blind squirrel]

$1 - 45 players tourney down to last 3; villains both way too passive given the high blinds imo.

villain (in this hand) playing a like a complete (bad) rock, never raising pf, folding to much shorthanded, and then mostly betting for "value" however a flop comes down with ace-, king-high or a middle pocket pair, eg. so in this hand his range has to be pretty much 22+, Q10+, K9+, Ax i´d say. given this information i puzzled about responding to his flopbet.

PokerStars No-Limit Hold'em Tourney, Big Blind is t600 (3 handed) Hand History converter Courtesy of PokerZion.com

Button (t4770)
SB (t6610)
Hero (t15620)

Preflop: Hero is BB with 2[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (t1350) 8[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets t1800</font>,

Hero ?