At a London auction later that year, the 50 paintings fetched a combined £536,580, then equivalent to around US$1.5 million. Many of them have since reappeared on the market at significantly higher prices. And now one of the works — Betonte Ecken, which in 1964 attracted a winning bid of just £22,000 (then around US$62,000, or NZ$961,000 in today’s money) from a New York art dealer — is returning to auction with an estimate of US$60 million (NZ$107m) to US$80 million ($142.5m).