Carmen Martínez Torrón/Getty ImagesVintage advertising signs from the baby boomer era have become cherished collectibles that ...

If you've ever seen an episode of the History channel reality show "American Pickers," you know the antique-salvaging hosts are crazy for vintage advertising signs. And with good reason.

Vintage advertising signs from the baby boomer era have become cherished collectibles that offer a unique glimpse into the past. For collectors, these items are more than just relics — they ...