he is looking to pay after you have given him the information which isnt the ideal situation for someone providing a service, as he can just block you after he gets what he wants, hopefully now i have said this any one else who talks to him would get paid alongside this he became abusive and spammed the conversation after i refused to give him a link to my niche as i didnt want to expose my niche site, lack of respect generally throughout the conversation.
Deal with at your own risk. Hopefully now i have said this he will learn some manners.