A first issue of Action Comics, Superman's debut, has become the world's most expensive comic selling at ComicConnect for $2.16m (£1.4m).  It started at just $1 and overtook the record for the same comic from March last year which clocked in at $1.5m at slightly worse condition.  There is lots of background on this comic that you can read on Nicolas Cage's Superman Comic Nets Record $2.1 Million at Auction.

Comics is one of the next markets The Martingale is targeting.