The UK catalogue retail chain Argos are currently selling the previously hard-to-find The LEGO Batman Movie key chain, 5004928 Kiss Kiss Tuxedo Batman.
Aside from a brief stint at the LEGO Store London, during which the giveaway lasted for just one morning, the key chain has never seen wide UK distribution. Argos are selling the polybag for £2.99.
In an unusual move, this is the only way that the LEGO Group has made this iteration of the Batman minifigure available – usually, such key chains are duplicates of existing minifigures rather than exclusive to the novelty product range. It seems likely with the timing that this was originally intended as a tie-in promotional product for The LEGO Batman Movie release on home formats.