How much do you bet here?

[Insty]

Anywhere between 75 and 125 depending on whether the limper is likely to fold.
If he wont fold, I'll bet 75 so it's easier to get away from if I miss, as I'm likely to get called down with bottom pair.
If I think he will fold, I'll bet 125 because if he doesn't fold preflop he's also more likely to check fold the flop if he misses.