Hmm, he says,
If you are the successful bidder, I will email you everything that you need to know in order for you to fly for free.
Doesnt mean you will be with him.
Sounds similar to the scam where you advertise for people to make easy money and ask for £1, having sent your quid, you get a reply saying "place an advert charging £1 for info on how to make easy money" and so it goes on.
In the case of flying though, I cannot imagine such a scam being sustainable but I can imagine just getting a piece of paper that tells you to get your commercial licence then you wont have to pay to fly.
Cynical aint I.