Grunge is passé, but the market for its collectibles isn’t, reports Portfolio. Nostalgia plays a big role in determining what's hot, and prices on items of baby boomer vintage, even from the likes of the Fab Four, are starting to drop. Meanwhile, the demand for Gen X artifacts—skateboards, Star Wars figurines, old video games—is on the rise.
"A guitar of Kurt Cobain's was worth maybe $10,000 a decade ago," says one expert. "Today, you couldn't touch one for less than $100,000.”