This grandiloquent Marlborough Street duplex hit the market in January with pomp and vigor. It didn't just have 4 bedrooms, according to the listing—it had 4 bedroom suites. The kitchen wasn't merely eat-in—it was "gourmet eat-in." And there was a butler's pantry. Now, as of yesterday, there's a titanic price-chop: $400,000. It ties this Beacon Hill townhouse for the biggest price-chop of 2012 so far. The 5,841-square-foot spread with 12-foot ceilings, a private deck and two parking spaces is humbling asking $5,500,000.