PokerStars No-Limit Hold'em, $0.10 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($9.85)
Hero ($15.45)
Button ($13.40)
SB ($11.55)
BB ($11.20)
UTG ($8.35)

Preflop: Hero is CO with Q, Q.
2 folds, Hero raises to $0.3, Button calls $0.30, 2 folds.

Flop: ($0.75) T, 7, 3 (2 players)
Hero bets $0.6, Button calls $0.60.

Turn: ($1.95) 9 (2 players)
Hero bets $1.5, Button calls $1.50.

River: ($4.95) J (2 players)
Hero checks, Button bets $3.5, Hero calls $3.50.

Final Pot: $11.95

Villain just sit down, but he's running at 100/0/0.9 over 8 hands.

If these stats were over any moderately meaningful sample size (e.g 50+ hands) then it's an insta-muck. With 8 hands the question is: "Does unknown player bluffs missed draws enough to make it profitable to call?"

Check/calling river to induce bluff from missed draw is fine play as long as you can put opponent on a range that is made up mostly with draws. Here a lot of straight draws hands (counting gutshots) have improved to beat your hand. So as spade draw is the only draw left and opponent is unknown (i.e we don't know weather he bluffs missed draws or not) then I wouldn't c/c this river. Bet/fold if you think you're ahead, otherwise c/f.

As played fold.

Bet/fold river. Stations call, not bet. Let him do what he does and have a wide calling range against your overpair.

I'm confounded.

Who's the station?

Me obviously.

over a grand total of 8 hands this isn't a superstrong read but stations be stations...

anyhoo +1 for bet/fold the river. If he's a station there is almost always value in betting a hand with showdown value, and since stations don't raise without the near nuts you can get away ez