Perched high in the south tower of the Time Warner Center at 25 Columbus Circle, a glassy corner condominium with unobstructed northern and eastern views of Central Park and the cityscape from every room sold for $13 million, the most expensive sale of the week, according to city records. This seven-room residence, No. 69B, sold for $12.25 million in 2008 and had bounced on and off the market since 2011. It had been listed for as much as $16.9 million, but sold quickly after its asking price was reduced by $1 million to $13.98 million. That, apparently, is the difference a million dollars makes at this juncture in an active market; though the 2,317-square-foot unit offered the option of buying the modernist furnishings along with the property, it was sold unfurnished. The three-bedroom, three-and-a-half-bath condo has 10-foot ceilings and impressive floor-to-ceiling windows that frame the views throughout. There is an eat-in Miele kitchen, and a master suite with a dressing room, a soaking tub and a glassed-in shower. The other bedrooms have en-suite baths. The carrying charges are $8,222 a month. A favorite with the pied-à-terre population, condo ownership at Time Warner, where the amenities begin with a Whole Foods market downstairs and extend upward to a roof deck with dazzling vistas, also bestows the privilege of access to the over-the-top spa facilities at the Mandarin Oriental, its equally swank sister tower. The seller used a limited-liability company, Kurth Columbus Circle, as did the buyer, apparently a minimalist listed in city records only as 69-B. Caroline Holl, Wendy Sarasohn and Jamie Joseph of the Corcoran Group were the listing brokers. Deborah Grubman, also of Corcoran, represented the buyer.