It's one thing to buy a penthouse apartment in a luxury high rise. People do this every day, and of course more power to them on that. But it's kind of eye-opening when a penthouse sells for $25 million in cash, as just occurred at the West Village's Superior Ink.The Superior Ink penthouse sale marks the second-largest Manhattan closing of the week, and something of a coup for Superior Ink, which continues to stake its claim as something of a rising star in the West Village given its combination of luxury apartments and sustainable green design elements. The LEED-certified high-rise balances energy-efficiency and sustainability with a wide array of posh luxuries -- a yoga studio, a screening room, that sort of thing -- but its striking apartments and townhomes have earned plenty of attention as well, thanks to their eye-popping river views, elegant appointments and soaring ceilings. All of which is to say that Superior Ink is the sort of Manhattan high rise, in short, that could very easily sell its penthouse for $25 million. In, yes, cash. Wow.