1/2 River 2 Pair Decision

[Aukai]

Live 1/2, have played minimal limit before with villain but never NL. Villain sat down at the table 2 hands prior to this hand, player to my left says "This guy plays wild."

I have 600, villain covers by plenty.

Pre: 2 limps to me, I raise to $17 in the CO w/AKo. Only villain calls from the BB.

Flop ($39): 269 rainbow. He check calls $20

Turn ($79): K. He check calls $60.

River ($139): A. He bets $120.

I...