Tough Question

This one's probably been asked hundreds of times, but being new to the board I'd like some opinions. You're on the bubble with a stack worth 2 bets and the big blind coming right at you. You have a marginal but not awful hand, say K7s. Do you raise all in and hope for a steal, or muck and pray that the blind is kind. Let's make this more interesting and say that the player to your left has but 1 bet left. Opinions?