Andreas Gursky, 2001. Düsseldorf supermarket aisle. Sold for $3.3M in 2007 — then most expensive photograph ever.
From Wikipedia
99 Cent II Diptychon is a two-part colour photograph made by Andreas Gursky in 2001. It was based on an original photograph called 99 Cent, from 1999, sometimes called "99 cent.1999".