Cryptologic
Pot Limit Omaha Ring game
Blinds: $0.25/$0.50
8 players
Converter

Stack sizes:
UTG: $49
UTG+1: $19.50
MP1: $81.15
MP2: $41.25
CO: $20
Button: $52.05
SB: $44.40
Hero: $48.65

Pre-flop: (8 players) Hero is BB with K Q 3 9
UTG folds, UTG+1 calls, MP1 folds, MP2 calls, CO (poster) checks, Button folds, SB calls, Hero (poster) checks.

Flop: K 4 9 ($2.5, 5 players)
SB checks, Hero bets $2.5, UTG+1 folds, MP2 calls, 2 folds.

Turn: 6 ($7.5, 2 players)
Hero bets $5, MP2 calls.

River: 8 ($17.5, 2 players)
Hero ?

Results:
Final pot: $17.5

i think it's a check/call.

the only villain hand that makes sense is 10JQ. you only have value here from letting him bluff.

his bet will be a bluff more often than a set.

I agree with above in general with no reads. WAWB concept applies here and also you want to induce bluff.

I will only value bet if I have good read on villain (for example, I have note that he's a call station who will call with a weaker hand but will check if check behind, etc). I don't like blocking bet oop against strong or weak opponents.