Of course people will try to sell codes and probably some people will buy them on occasion. I doubt anyone will get much, but imagine if someone is, say, 30 points away from Platinum, with a day to go, and they don't want to spend $30 on a game they don't want just to reach Platinum level. I bet they'd be willing to pay somebody, say, $5, maybe more, for a valid DS reg code. So, come June 30th, I think reg codes will be sold.