BB special, flops the stupid end; What to do now?

[medaugh]

Don't have good reads on anyone involved in the hand. They are pretty typical .25-.50 players. They play some hands good and just play others like donks.... kinda like me [img]/images/graemlins/crazy.gif[/img].

PokerRoom 0.25/0.50 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is BB with 4 [img]/images/graemlins/heart.gif[/img] 5 [img]/images/graemlins/club.gif[/img] . CO posts a blind of $0.25.
UTG calls, <font color="#666666">2 folds</font>, MP2 calls, <font color="#666666">1 fold</font>, CO (poster) checks, Button calls, SB completes, Hero checks.

Flop: (5 SB) 7[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">SB bets</font>, have the feeling that I should raise here to try to take it down now.

Whats the plan if we get caller and say like a 9 falls. bet/fold?