[Siegmund]

I find it is easiest to consider one street at a time.

You are deciding now whether to pay to see the turn, and if you miss, you'll decide again later whether to pay to see the river.

On the flop, you are hoping to put in 2 small bets to try to win 16 or 18. If it gets reraised or capped, you may find yourself putting in 3 to win 18 or 4 to win 20.

How much do you think your high ace is worth? On a gutshot to the nuts you want to be getting 10:1 to continue; you can reasonably call your hand 5 or 6 outs since AK or AT might have raised preflop.

If you don't think it will be reraised, you get 8:1 or 9:1 (if SB stays in); if it does get reraised or capped you get only 6:1 or 5:1 and are paying too much to stay in.

On a blank turn, you will face the same decision again. There will be between 9 and 12 big bets in the pot. If it's one bet to you, you'll be getting 10:1 to 13:1 odds and want to see the river. If it's bet and raised to you, you get between 13:2 and 16:2 and have to worry about reraises again.

Bottom line, this hand is a call against a BB who rarely 3-bets, but a fold against an agressive or unknown villain.