thin valuebet on the River?

[Scipio]

SB has 30/15/1,3/29 stats

I had a timingtell, he called very fast on the flop and very fast on the turn. I saw some Value on the River but which betsize? I thought about bet/folding 120$. Thoughts?

Titan No-Limit Hold'em, $3.00/$6.00BB (Titan HH Converter by Kreatief)

MP2 ($484.13)
MP3 ($1,604.37) (Hero)
CO ($579.00)
Button ($567.00)
SB ($389.60)
BB ($689.95)

Preflop: Hero is MP3 with Q[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img]
<font color="#CC3333">Hero raises to 24.0</font>, <font color="#666666">2 folds</font>, SB calls $21.00, <font color="#666666">1 folds</font>,

Flop: 9[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/club.gif[/img] ( $54 )
SB checks, <font color="#CC3333">Hero bets $38.00</font>, SB calls $38.00,

Turn: Q[img]/images/graemlins/spade.gif[/img] ( $130 )
SB checks, <font color="#CC3333">Hero bets $100.00</font>, SB calls $100.00,

River: 8[img]/images/graemlins/diamond.gif[/img] ( $330 )
SB checks, Hero ???