Memorabilia collecting is built on the sunny premise that yesteryear's omnipresent junk is today's rare gem. That premise implies that the junkier the item was in its own time, the more wondrous it is in the sweet glow of nostalgia. The fine people at Pop Culture Classics understand this. Where else are you liable to find an unopened can of Billy Beer, as powerful -- and rare -- a piece of '70s Americana as you can purchase, for $25? The arcana doesn't end there. Whether you're in need of KISS makeup kits, Chewbacca masks, Doctor Who comic books, UNICEF Barbie dolls or Charles Barkley action figures, this is your one-way ticket to trash heaven. Just don't try drinking that Billy Beer.