Villain is 52.4/10.6/4.40 over 170 hands. Solid, very aggressive postflop, usually always bets if it's checked to him or if he senses weakness. He sees me as a tight player and he probably thinks he can buy the pot if I miss the flop. I also think he doesn't put me on 54s.

I had really no idea what he was trying to accomplish with his push. He certainly knows I know he likes to bluff, but he also knows that I'm not calling him without a good hand when we're this deep and I've shown weakness by checking the turn.

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($23.85)
UTG ($95.45)
UTG+1 ($90.75)
MP1 ($99)
MP2 ($124.25)
Hero ($180.20)
CO ($23.75)
Button ($121.70)
SB ($213.10)

Preflop: Hero is MP3 with 4, 5.
4 folds, Hero raises to $4, 2 folds, SB calls $3.50, 1 fold.

Flop: ($9) 7, 9, A (2 players)
SB checks, Hero bets $6, SB calls $6.

Turn: ($21) 6 (2 players)
SB checks, Hero checks.

River: ($21) 3 (2 players)
SB bets $203.1 (All-In), ??

Call or wait for a better spot?

Edit: Forgot to mention that his stealing bets were usually about pot-sized, I had never seen him push before.