London’s contemporary art and design fairs closed Sunday with many dealers upbeat after achieving more sales than last year, even though buyers were taking their time and pressing for discounts. Among the browsers was Russian billionaire Roman Abramovich. While collectors passed on a $9 million Francis Bacon painting and a Picasso priced at $6.5 million, works by Ed Ruscha, David Hammons and Neo Rauch priced at $1 million or more had found buyers.