You never can tell what you’ll discover on eBay. And, lucky for us, Chicago cartoonist Mark Anderson was exploring the online auction house when he chanced upon a bunch of Doubl Glo Batman Valentines from 1966 and snatched them up. Now he has posted them on his website for all comics fans to enjoy! Have a look:
Way to go, Mark!
ETA: It turns out Hallmark also sold Batman Valentines that very same year! Check them out!