Not sure when this happened, but Syberia is now 19.99 at gamestop and online. I'd looked for this before on the GameStop website, but they didn't have an entry for it at all. Saw it at GS a couple days ago at this price and picked it up for my wife, since I hadn't seen it anywhere before. I really thought this was going to be a rarity, given it is a GS exclusive and you couldn't get it online, but now I see they do have it listed on their website, so maybe not. I still think it won't be exactly common, and given it is a great game suited to the DS, I think it will be in some demand, so maybe better get it while you can.
Also, does GS.com send new games sealed? That may be one of few ways to get a sealed copy if you are into that sort of thing, since most GSs gut their games.