Value Bet this river?

[quarkncover]

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) converter

UTG ($32.15)
UTG+1 ($27.55)
MP1 ($36.55)
MP2 ($4)
MP3 ($26.55)
CO ($29.55)
Button ($7.15)
SB ($21.85)
Hero ($25)

Preflop: Hero is BB with 8[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
<font color="#666666">5 folds</font>, CO calls $0.25, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: ($0.75) J[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $0.75</font>, CO calls $0.75, SB calls $0.75.

Turn: ($3) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $3</font>, CO calls $3, SB calls $3.

River: ($12) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, Hero checks, CO checks.

Final Pot: $12

No read on SB, he's new to table, his call on the turn has me quite worried, I have 1400 hands or so with CO, very rockish 22.24/3.27 and I'm very comfortable he has QJ, QT or JT here as I have seem him call down with two pair on a scary board like this on more than one occasion. With SB's check on the river do I have an easy value bet of 1/2 pot or so?