Live game, 3 limpers all look totally uninterested in the hand nobody stacks sizes vary from $120-$250, I'm in the small blind with 68 offsuit and a $119 stack, the $9 dollars looks really good so i shove.

I know seeing the flop is a gonna be a popular answer here but I was prepared to rebuy if i ran into a hand and the $9 up for grabs seems like i could steal it without a fight, is this ever worth the risk?  worth the dynamics you get after you rebuy?  

how many times must they fold for it to be profitable!?