. >> daniel boone was digging it out of kentucky, got $80,000 out of what he dug. >> reporter: now worth its weight in gold. then out of the blue -- there it is. >> right there by your feet. all of this is ginseng. there's the three prongs. see all these? >> that's amazing. >> jimmy: ginseng. >> reporter: a plant root long considered a natural aphrodisiac and cure-all in asia. for thousands of years. >> oh my goodness, look at that. >> reporter: i grew up hearing about its mythical properties from my very korean parents. >> i grew up hearing about all cures. so this is the body, the stalk. >> right. >> reporter: this root can retail up to $15,000 per pound in upscale asian boutiques. and it's set off a black market. investigators in west virginia confiscating more than 400 pounds of illegally harvested ginseng over the past few years. they say its street value, over $5 million. and along with it, all sorts of other contraband. ginseng hunting, as the locals call it senging, is legal as long as it's done properly at the right time of year. but with prices so high the cash crop can attract