Today's BuildingSpotter is on the Upper West Side, and when we walked by the other day, it was sporting a blue FOR SALE sign out front (but just cropped out of this shot). So your task is twofold: Name the address, and pass along the listing (or if it's already been snapped up, perhaps the sale price) to your friends and ours in the comment thread.
Also, don't forget our Curbed group photo pool on Flickr, currently sporting 817 digipix, but always ready to accept more into its big gaping maw. Sneakily cropped and address-less BuildingSpotter entries are always welcome there.