Bad river card - value bet?

[kenberman]

both guys are pretty loose/passiove

Party Poker 5/10 Hold'em (6 max, 5 handed) converter

Preflop: Hero is Button with T[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, MP calls, Hero calls, <font color="#666666">1 fold</font>, BB checks.

Flop: (3.40 SB) T[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, MP calls, <font color="#CC3333">Hero raises</font>, BB calls, MP calls.

Turn: (4.70 BB) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, MP checks, <font color="#CC3333">Hero bets</font>, BB calls, MP calls.

River: (7.70 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, MP checks, Hero checks.

Final Pot: 7.70 BB