Villain is a big fish, running 49/2/1.2 over 350 hands, down 4 buyins. He's a slowplayer, has won decent pots off me twice already at this table where I've 2 barreled good hands (tpgk and pair with nut flush draw) and then checked back rivers, once he had a turned flush, other time he flopped two pair but never raised despite a draw-heavy board.

How much value here?

Full Tilt No-Limit Hold'em, $2.00 BB (6 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

saw flop

MP ($304.95)
Hero (CO) ($200)
Button ($365.95)
SB ($413.15)
BB ($203)
UTG ($245)

Preflop: Hero is CO with 7, A
1 fold, MP calls $2, Hero bets $8, 3 folds, MP calls $6

Flop: ($19) 6, 4, 5 (2 players)
MP checks, Hero bets $16, MP calls $16

Turn: ($51) 9 (2 players)
MP checks, Hero bets $44, MP calls $44

River: ($139) 3 (2 players)
MP checks, Hero... ($132 behind)