i think I find a fold here…I think the question you have to ask here, is what can you beat?  with this dry of a flop, I don't see him raising you this big without a hand.  You are going to get a lot of different play in these stakes with players that spaz out with worse that may of flatted in position with a/k,a/q,a/j, etc, but most of the times I see them having 10s, JJ, and even QQ, not to metion they possibly could of hit their set, but if they are at all a thinkiing player they are probably calling your c bet on a rb flop to hopefully get more value on the turn.  I think he has an overpair which beats your 9s so I lay it down.  Lot of play left.

This is basically readless, all I know about him is that he isn't playing every hand and he flatted my 150 raise which should tighten his range a little. I'd put him on something like: 22-JJ, A5-AQ, KQ, KJ, KT, QJ, QT, T9s, 98s, 87s, 76s, probably some more suited hands. Of those I think he raises the flop sometimes (not always) with overcards or underpairs thinking I have nothing and am just cbetting, any top pair, 2 pair, overpairs, probably the 98s combo draw but not always, and sometimes sets (randoms so often slowplay sets in my experience). Putting that into pokerstove:

Board: 6d 2s 7h

Hand 0: 65.994%   65.52% 00.48%        428094     3114.00   { 99 }

Hand 1: 34.006%   33.53% 00.48%        219078     3114.00   { JJ-55, AQs-AJs, A7s-A6s, KQs, 98s, 87s, 76s, AQo-AJo, A7o-A6o, KQo }

I imagine he folds the underpair and overcard hands to a jam some of the time but I think I mostly get called and by the looks of it I'm clearly ahead.

Even tightening up his calling range a bit:

Board: 6d 2s 7h

Hand 0: 57.157%   56.33% 00.83%        210780     3114.00   { 99 }

Hand 1: 42.843%   42.01% 00.83%        157212     3114.00   { JJ-66, AQs, A7s-A6s, 98s, 87s, 76s, AQo, A7o }

With the money in the pot this doesn't even seem close. I know I made a lot of a assumptions. Hand reading at these stakes is pretty hard.