I believe the comic books shown below were the last newsstand issues of Batman, Superman, Action Comics, and Detective Comics (note the $3.99 price tag). After approximately 38 years of producing separate newsstand issues, the last ones have been produced (which seems pretty significant to me). Has anyone seen any later DC newsstand issues than the ones I've shown?
These were the last ones shown on Mile Highs website, and it looks to me like they were buying them off the newsstand every month and then re-listing them at outrageous prices.
If these really are the last newsstand issues, then the only newsstand issue that I've never seen from those 4 titles is Superman New 52 #8. There's approximately 1800 of them, and that's the last one on my list to find.