According to a lawsuit filed by Cause of Action, the FBI were willing to pay $50,000 to a British spy in order to obtain the phony Trump Dossier. 

FBI director James Comey authorised the wire transfer of funds to former British spy Christopher Steele, even though the information Steele claimed to have was completely fraudulent.

Thegatewaypundit.com reports:

A new report by The Times claims that the FBI was willing to pay up to $50,000 for it, however; the payment was never made…

Source: Report: FBI Was Willing To Pay $50,000 For Fake Trump Dossier – Your News Wire