I have a lot of mined hands on villain, but no notes He has really weird stats for a 400NL regular 23/4.5/1.5 over a ton of hands.

What does this look like from such a passive player? Should I value bet here?

Full Tilt No-Limit Hold'em, $4 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($636)
BB ($237.80)
UTG ($951.40)
UTG+1 ($500)
MP1 ($400)
MP2 ($148)
Hero ($428)
CO ($189.50)
Button ($342.20)

Preflop: Hero is MP3 with J, A.
1 fold, UTG+1 calls $4, 2 folds, Hero raises to $18, 3 folds, BB calls $14, UTG+1 calls $14.

Flop: ($56) 6, T, J (3 players)
BB checks, UTG+1 checks, Hero bets $40, BB calls $40, UTG+1 folds.

Turn: ($136) T (2 players)
BB checks, Hero checks.

River: ($136) 9 (2 players)
BB checks, Hero...