In our humble opinion, this is a super cute house. Lefferts Ave. is lined on one side with 1920s (or 30s?), two story bungalow-ish houses, similar to those found on Maple I. We appreciate the open feel of these houses as well, as they're more light-filled than most brownstones and many of them are equipped with built in dressers and stuff.
That's a giant difference. We hate to beat the same drum again and again, but we believe that the big firms do a much better job marketing homes in PLG. That sort of price discrepancy is ridiculous, and, based on the ad, our guess is that the broker handling the property will not co-broke.
Poor organization and limits on publicity do not do right by the seller. We're all about the little guy getting his/her piece of the pie, but it shouldn't be to the seller's detriment.