Wrong to take the free showdown?

[skoal2k4]

SB is 31%/0%/0.71 over 284 hands

PokerStars 0.50/1.00 Hold'em (10 handed) converter

Preflop: Hero is UTG with J[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#666666">7 folds</font>, SB calls, <font color="#666666">1 fold</font>.

Flop: (5 SB) 7[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

Turn: (3.50 BB) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

River: (5.50 BB) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Final Pot: 5.50 BB

Should I be value betting this river?

[Jaran]

Given how passive he is, I don't have a problem with ck'ing behind here. Make a note on what he shows down, and then you can decide whether you can value bet him in the future.

-Jaran