Frantic bidders are racing to acquire a painting by British pop legend David Bowie, which was recently discovered at a Canadian store that resells donated goods. The computer and acrylic collage on canvas is part of the so-called <em>D Head</em> series of portraits of the <em>Ziggy Stardust </em>rocker himself, his friends and others that he painted between 1995 and 1997. It is signed on the back with his initials. Opening bids of more than CA$15,000 ($14,000) blew past Toronto auction house Cowley Abbot's estimated CA$9,000 to CA$12,000 valuation of the diminutive artwork on Tuesday. The online auction closes on June 24. "We were very excited to discover that the artwork was original and authentic," said auctioneer Rob Cowley. "We are fans of David Bowie's work and it is very exciting to bring an artwork by him to the market." The 24 by 20 centimetre painting of a pale figure dressed in teal clothes, with teal and red hair on a crimson background, was originally sold through a website around 2001. It somehow found itself two decades later at a donations store in South River, Ontario, 300 kilometres north of Toronto. There, an anonymous buyer paid CA$5 for it. Bowie attended art school and was an avid collector. His estate fetched tens of millions of dollars after his death in January 2016 for about 350 works from his collection, including pieces by Basquiat, Henry Moore and Damien Hirst. But his own artworks, according to Cowley, rarely go on sale. Starting with <em>Space Oddity</em> in 1969, Bowie scored hit after hit over more than four decades, ranging from <em>The Jean Genie</em> and <em>Heroes</em> in the 1970s to <em>Let's Dance </em>and <em>Modern Love </em>in the 1980s to more recent hits such as 2013's wistful <em>Where Are We Now?</em> Many of these became era-defining hits around the world while successively defining what it meant to be a music legend. Two days after the release of his 25th studio album, <em>Blackstar</em>, on his 69th birthday, Bowie died of cancer.