[Garland]

I doubt SB has an overpair to the 6 (or any pair for that matter), for he would raise preflop.

The Bad:
I'd say he could have a 3, which he's waiting in the weeds to pop you for a check-raise or he has 45, a busted draw, which will not pay you off another bet.

The Good:
The other scenario is he has a 6, and that 6 is worse than yours and you can value bet that.

The Ugly:
You were going to call one more bet anyways, right? So in the end I think you can value bet this if you have the discipline to lay down to a check-raise, otherwise check behind.

Garland