If this has made you $1,000 then why would you want to sell it just got make an extra $ it does not make scene what so ever to do such a thing. Is the account hacked compromised? If I had a channel like this id be adding more videos and getting more people on it and making an income off it for-sure not to sell and make a quick buck.
there is obivously a catch somewhere. Good chance hes tried to do that, but lost his audience
Well who knows seems he not been online since so no doubt scam and trying to pull scam off. If OP no responded within next few days then id advise sticking well away from this as no doubt indeed a catch and something else going on.