50 FR: Spew or Thin Value call on river

[EnderIII]

Should I:

A) never make this call, it is a huge leak
B) often make this call the way the hand was played
C) rarely make this call if i have a good read
D) stop playing because this is a stupid question


Stack sizes:
EnderIII: $57.55
UTG+1: $54.25
MP1: $34.45
MP2: $2.90
MP3: $12.80
CO: $27.65
Button: $16.90
SB: $46.80
BB: $27.35

Pre-flop: (9 players) EnderIII is UTG with 7[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img]
4 folds, CO calls, 3 folds, EnderIII (poster) checks.

Flop: 5[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] ($1.20, 2 players)
EnderIII checks, CO checks.

Turn: 9[img]/images/graemlins/heart.gif[/img] ($1.20, 2 players)
<font color="#cc0000">EnderIII bets $1</font>, CO calls.

River: 8[img]/images/graemlins/club.gif[/img] ($3.10, 2 players)
EnderIII checks, <font color="#cc0000">CO bets $3.25</font>,

Also, is not leading out on the flop a signficant mistake? I don't do it all the time, but was going for the occasional checkraise out of the blind when i actually did hit a piece of junk.

[Mrage]

Lead flop, I'd made it $1. You probably take it down right there. As played I fold river since he probably got there with a 6.