Value Bet 3 Streets with overpair?

[MikeyPatriot]

Reads: None, 2nd orbit at table, haven't seen villain do anything worth noting.

Poker Stars - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $120.25
BB: $100.00
UTG: $78.00
CO: $31.90
Hero (BTN): $99.50

Preflop: Hero is dealt Q[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (5 Players)
2 folds, <font color="red">Hero raises to $4.00</font>, SB folds, BB calls $3.00

Flop: ($8.50) 3[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $8.00</font>, BB calls $8.00

Turn: ($24.50) 6[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $18.00</font>, BB calls $18.00

River: ($60.50) 5[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, Hero ???

I've been trying to increase the value I'm getting from my hands, and this is a spot that I'm kind of torn on though I know it's pretty basic. Is this a clear check or should we be betting for value?