…Jonathan J. Miller of the real estate appraisal firm Miller Samuel said: “We’re building the equivalent of bank safe deposit boxes in the sky that buyers can put all their valuables in and rarely visit.”…

…As in other major metropolitan cities, New York’s luxury market – which forms the top 10 per cent of the sales – peaked in early 2009 on average prices of $2,612 per square foot, according to Miller Samuel….