River bluff opportunity - Thoughts?

[daviddem]

You probably get folds from A high, KQ and maybe 22, 33, A4 and A5. imo your line reps a 66-88 PP trying to get value from lower pairs.

So I'd say it largely depends on whether you think your opp would call the flop with his A high hands, or A high + backdoor flush draw. And whether he is the kind who calls preflop with A4 or A5. And it also largely depends on whether villain is capable of folding a low pair to your small river bet.

As a general rule: don't bluff at unknowns.