4/180 - value bet straight on the river?

[miw210]

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 (t1870)
MP3 (t1650)
CO (t1390)
Hero (t3080)
SB (t1070)
BB (t1370)
UTG (t1920)
UTG+1 (t1340)
MP1 (t1160)

Preflop: Hero is Button with 6[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/heart.gif[/img].
UTG calls t20, <font color="#666666">1 fold</font>, MP1 calls t20, MP2 calls t20, MP3 calls t20, <font color="#666666">1 fold</font>, Hero calls t20, SB completes, BB checks.

Flop: (t140) 5[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(7 players)</font>
SB checks, <font color="#CC3333">BB bets t60</font>, UTG folds, MP1 calls t60, MP2 calls t60, MP3 folds, Hero calls t60, SB folds.

Turn: (t380) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets t120</font>, MP1 folds, MP2 calls t120, <font color="#CC3333">Hero raises to t500</font>, BB calls t380, MP2 calls t380.

River: (t1880) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, MP2 checks, Hero checks.

Final Pot: t1880

No info on villains. Do you bet this river for value or check behind (BB has about 800 left behind, SB about 500)