When we last checked in back in November, the price on 306 Washington Avenue had already been reduced from $2,300,000 to $1,900,000. Not far enough, it turns out. The five-story brownstone just closed at the end of last week (not long ago enough to make it into public records or the Top Sales list) for, get this, $1,680,000. The four-family brownstone went to contract in January just shortly before one of the rent stabilized tenants vacated, creating some instant value for the new owners. GMAP