Damien Hirst's first exhibition for 20 years is unveiled

Damian Hirst's 1991 work 'The Physical Impossibility of Death in the Mind of Someone Living' Credit: Press Association

Damien Hirst merchandise, from a deckchair to a plastic skull, is on sale for eye-watering price tags of up to £36,800 at the first UK retrospective of the controversial British artist.

The items can be snapped up at Tate Modern's highly-anticipated show, which opens just days after a critic and former curator urged owners of Hirst's work to sell quickly before "the penny drops".

The show, entitled Damien Hirst, features some new work in the form of diamond and butterfly-decorated wallpaper, and highlights from the 46-year-old's phenomenally successful career.

Hirst's installation In And Out Of Love is shown for the first time since its creation in 1991, comprising a room full of live butterflies, feeding on sugar water and fruit which visitors are advised to go through at a "steady, slow pace", next to an adjoining room of dead butterflies on monochrome canvases.

Artist Damien Hurst with his work 'I Am Become Death, Shatterer of Worlds 2006' Credit: Press Association

Visitors will be assaulted by the smell of dying flies and a rotting cow's head in A Thousand Years (1990), where flies emerge from maggots, eat from the animal's head and die on an Insectocutor.

For The Love Of God, the human skull covered in 8,601 flawless diamonds - the work Hirst says he is most proud of - is on display at Tate Modern's Turbine Hall, with its own security.

The retrospective also features a shark suspended in formaldehyde in The Physical Impossibility of Death In the Mind Of Someone Living (1991), Hirst's largest spot painting, the Pharmacy (1992) installation of medicine bottles, spin paintings, and hundreds of used cigarettes in a giant ashtray in Crematorium (1996).

Damien Hirst replica plastic skulls for sale in the gift shop at the Tate Modern. Credit: Press Association

At the end of the exhibition, which opens on Wednesday, visitors can spend £700 on a limited edition roll of butterfly wallpaper, or part with £36,800 for a plastic skull decorated with "household gloss" in the style of one of Hirst's spin paintings.

Other objects on sale include a butterfly-print deckchair for £310, and a spot painting-style skateboard "stamped with signature" for £480.

A woman looks at the gallery-sized installation 'Pharmacy'. Credit: Press Association

Hirst said he had been asked to do a retrospective since he was 28, but he had shied away from the idea.

"I think I was avoiding it because I was afraid of it in some ways," he said. "The idea is more frightening than the reality. You have to get to the point when you are ready to look back."

Artist Damien Hirst with 'Doorways to the Kingdom of Heaven 2007'. Credit: Press Association