I wouldn't feel too bad were I you. It's not like you're going to find a pile of people parting with something for cost, though some do (some do even more than that). Plus it was a raffle, you put in your ticket and took a shot. It's not like you went out trying to find one just to plop on ebay. I think combining the raffle with the desire to trade is perfectly reasonable. Had you been at C4 and scammed 8 of them, well, that's different.
I'm not sure anyone will go for the trade Neyo-Gree, but all you can do is ask, right? Isn't Neyo only 1000 pieces? Not sure how you'd hook up with a guy in Japan to do that though, not a lot around (yeah, I asked my bud, but he's tapped by other people too, so if I even get one, I'm lucky).
Neyo and the England exclusive are the raffles where I'm crossing my fingers. If I don't get them, I'll happily live without them, just like the AOTC clones.