Guerrilla artist Banksy is believed to have painted several new murals in Glastonbury, in the heart of Somerset.
No-one knows if the mural is a genuine Banksy
The street artist from Yate is thought to have daubed artwork on walls, including one mural depicting a policeman searching a young girl.
Derek Balmer, from the Royal West of England Academy, said: "He has received publicity as no-one knows who he is.
"Big money is paid as there are people who want to be part of this celebrity culture. He is laughing at them."
Banksy's work has become very desirable among collectors with Angelina Jolie and Christina Aguilera among those reported to have bought his art.