People will pay top dollar for anything, as long as they think it's a rare treat.

Taiwanese coffee farmers have long been pestered by Formosan rock monkeys, which eat the reddest, ripest berries from coffee plants and spit out the seeds. But now farmers are collecting these half-chewed seeds and roasting them to produce a coffee that connoisseurs consider a delicacy. Not only does the monkey "save [farmers] the trouble of peeling the fruits," the partially-chewed seeds "yield a sweeter coffee with a vanilla-like scent."

The monkeys' contribution adds more than flavor; it also adds value. This rare blend sells for around $320 a pound.

(Editor’s note: the price for the coffee was updated as of 10/23)