In the annals of recorded music as collectors’ items, nothing stands out quite like “Once Upon a Time in Shaolin,” the Wu Tang Clan album that was minted as a limited edition of just one copy, with a prohibition on any reproduction, and sold for $2 million to the highest bidder in 2015. The plot thickened when said bidder turned out to be hedge fund founder Martin Shkreli, who turned himself into one of America’s supervillains soon after buying the right to become the album’s sole owner and