NL 50 flopped flush, river pairs board

[Babalatexi]

Villain is a 17/7.14/0.85 passive, fishy calling station type of genius after almost 700 hands. I guess his possible holdings are sets, a higher flush and AJ+ after calling the flop and turn, really don't think he could have A4/A5. Any value in betting the river? Would even a guy this passive check the river after completing the boat?

B2B No Limit Hold'em Cashgame
Blinds: €0,25 / €0,50
Players: 6

Button (€70,58)
SB - Villain (€70,70)
BB (€11,43)
UTG (€57,72)
MP (€35,59)
CO - Hero (€52,42)

Preflop: Hero is CO with 7[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img]
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to €2,00</font>, <font color="#666666">1 fold</font>, Villain calls €1,75, <font color="#666666">1 fold</font>

Flop: (€4,50) 5[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets €4,50</font>, Villain calls €4,50

Turn: (€13,50) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets €12,00</font>, Villain calls €12,00

River: (€37,50) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, Hero ?

[Ramana]

He could certainly check a FH. He could even call down with 2p+ till river but also with a lot worse. I make a valuebet of 15, and call a shove. I wouldn't shove river, because you need value from worse hands on this river, and you may fold out hands that you beat if you shove.

[BalugaWhale]

id go allin

[shoxbb6]

Easy push against a calling station

[Jw513]

Def make a value bet on river. Set/2pair would have raised at some point.