It's great to decode a blast from the past

Nostalgia is not what it used to be. Today, it is even bigger, spawning an industry that is worth around $2 trillion, according to the "Mad Men" of the global advertising and marketing sectors.

From those clunky 1950s wireless sets to those hyper-colored vinyl records of the 1960s, a trip down memory lane is usually paved with dollar bills.

On eBay, 1970s retro fashion mingles with 1980s Walkmans, turning the vintage market into a $1.1 billion business.