[eMarkM]

Seems like an easy fold here. Normally, 4 handed I'd raise a lone A and try and take the blinds. But, if I'm reading this correctly, you have a BB who has 150 and will have to post that in the SB on the next hand. Fold and hope he loses the next hand and you're in the money. You will be left with 250 if you don't play out of the blinds coming up. Even if the SB doubles through here, he will get the blinds again first the next round and could get eliminated there. I pretty much wouldn't play a hand unless he doubled up a couple times and overcame you somehow. I'd try and wait him out in this spot.

You don't need to make a move here since at this stage you're playing for 3rd or 2nd since the big stack has such a huge lead. The difference between 2 and 3 is not big enough to try and gain chips by raising or playing your A in this situation. Easy fold.