Banksy's Kissing Coppers, painted on the side of Brighton's Prince Albert pub, is to be auctioned in Miami tonight.
The graffiti masterpiece was painstakingly taken off the wall of the pub in 2011 and flown to the US by a private dealer. At the time, it was said it might sell for up to £1 million.
Tonight, it is expected to fetch between $500,000 and $700,000 (£300,000 and £420,000) at Fine Art Auctions Miami.
It will be the first time it has been viewed since being removed from the Prince Albert in Trafalgar Street.
A specialist art restoration company used chemicals to transfer the policemen to canvas.
The original has since been replaced with a careful replica, and encased in perspex to prevent vandalism.