33r PCA sat final table hand

Down to 4 handed of the 33rebuy WPT PCA super. 1st place gets a seat. 2-4 get 650. villian here was the most agressive player left. this seemed a perfect time for a resteal. things get messy when on the flop. is this as easy as a call as i think it is? do you agree with the lead bet? i figured i had a very large chance of taking it down right away, but why oh why did i bet so little?

PokerStars No-Limit Hold'em Tourney, Big Blind is t6000 (4 handed) converter

Hero (t150092)
UTG (t158206)
Button (t197256)
SB (t246446)

Preflop: Hero is BB with 3[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">SB raises to t18000</font>, <font color="#CC3333">Hero raises to t48000</font>, SB calls t30000.

Flop: (t96600) 2[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t18000</font>, <font color="#CC3333">SB raises to t132000</font>