Banksy is back in the news dur to the premiere of his new movie. But his old work is still attracting attention, especially from collectors. The Telegraph has the story of two new

The pair of friends bought the wall in Croydon, South London after it was stencilled with an image of a punk rocker trying to follow the instructions for a piece of Ikea flat-pack furniture in the distinctive Banksy style. The work – on a construction site wall near the Croydon Ikea store – even appeared on the graffiti artist’s website under the title “Large Graffiti Slogan.”
But Bradley Ridge and Nick Loizou, who bought the wall in the hope it would sell for up to £500,000, have been unable to certify the image as genuine because the artist has refused to officially recognise it as his own work. […] Despite this setback the two men remain confident they will be able to sell the three-tonne, reinforced concrete wall after spending £30,000 on extracting it from the ground and preparing it for sale.
Collectors Spend £30k Rescuing Banksy Mural–But He Won’t Confirm It’s Real (Telegraph)