Rarest Sonic the Hedgehog comic

Having been around for over 20 years, the Sonic the Hedgehog comics are the longest-running comic series based on a videogame. But before the series started, a comic called Sonic the Hedgehog #1: Promotional Issue was released in America to publicise the first Sonic game. Few copies are still in circulation today, leading fans to estimate the value of a good-quality copy at $1,000 (£640), making the original comic the rarest Sonic comic as well.