The costs range widely from 300 to 1000 dollars a pound. This assumes you mean the truffle fungus. If you mean candy truffles, they would also range widely but not nearly so much. More like 20 to 100 dollars a pound.
truffels
It cost 1.75
2.30
The french perfume industry is worth/cost 750 million US dollars
2p
£10
$1.89
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My understanding is that they use pigs to find truffels
350,000
5.86
2,000 dollars ;D