Maybe because he got them from some bounty that is why he is selling below ICO.
I'm not selling below ICO, ICO price around 3700.
How i know you are not going to take my .35 btc and not give me anything.
That's precisely the point why the OP adivsed to do such trades only with people you know well.
You have to trust the person you deal with to keep his word.
Unless you can transfer the tokens to a new account. I doubt the devs will code in such ownership transfers in the ICO dashboard.