I got the feeling from his betting that he was weak here, based on the minreraise on the flop, checked turn, and then random big bet on the river.. so I made the call. I was thinking that the reraise on the flop was a resteal attempt, since it is unlikely that he hit the flop, and that if he had a weak overpair, he'd bet more since it's vulnerable, and if he had a premium overpair, he'd also let me know about it. What do you think?

Party Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Stack sizes:
UTG: $4.90
Hero: $31.25
CO: $28.65
Button: $47.65
SB: $27.95
BB: $25

Pre-flop: (6 players) Hero is UTG+1 with 3 3
UTG folds, Hero raises to $1, 3 folds, BB calls $0.75.

Flop: 8 6 8 ($2.1, 2 players)
BB checks, Hero bets $1.5, BB raises to $3, Hero calls $1.5.

Turn: K ($8.1, 2 players)
BB checks, Hero checks.

River: 7 ($8.1, 2 players)
BB bets $5, Hero calls $5.

Results:
Final pot: $18.1