would you value bet this river?

[magicmntn]

ok fixed post
Party Poker No-Limit Hold'em, $ BB (10 handed) converter

CO ($55.30)
Hero ($59.25)
SB ($49.65)
BB ($56.35)
UTG ($59.05)
UTG+1 ($30.30)
UTG+2 ($49)
MP1 ($49.50)
MP2 ($34.65)
MP3 ($33.50)

Preflop: Hero is Button with Q[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $0.25.
UTG calls $0.50, <font color="#666666">3 folds</font>, MP2 calls $0.50, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $3</font>, SB (poster) calls $2.75, BB calls $2.50, UTG calls $2.50, MP2 folds.

Flop: ($12.50) 9[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">BB bets $5</font>, UTG calls $5, <font color="#CC3333">Hero raises to $20</font>, SB folds, BB calls $15, UTG folds.

Turn: ($57.50) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: ($57.50) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

Final Pot: $57.50

My question is should I have checked behind on the river, or should I have bet