Even charity variants,i got an ironman cover with blue suits for prostate cancer .few cent goes to the cause....lenticular ,and some consider other printing like variant especially because the art cover can change.the first full doomsday fourth printing is scarce so pricey.i collect Killing joke printing ho and some collect uk variant Mexico ect.....some un variants are considered first print, came out almost the same time than us release like the un Killing joke......ouch finger cramps too much writting