We know times are tough, but $100 a foot for a brownstone? Yessirree, Bob. This three-story, 2,400-square-foot building at 224 Lexington Avenue in Bed Stuy that sold in September obviously needs work but it’s still gotta be the cheapest transaction of its kind in recent memory. Unless, that is, you include the $260,000 price the seller paid just three months earlier for the down-on-its-luck property. Of course, in the end, the lawyers and gov’t were probably the only ones to make any money on the deal.