hedwards: Unless you've got some sort of citation or actual evidence, you really ought to stifle it. You assume that there's no way that they could do it, but I don't see any actual evidence that they can't do so legally.
All I see in your post is slander.
Eh? This is economic common sense, and a bit of deduction. If you care to follow:
I hypotesize that it is impossible to sell DNF to US customers, or EU customers for that matter, for a price below $30, at a profit. I doubt he's selling the game for purely altruistic motives with a loss, so it follows that something is fishy with this deal.
If you want to look up import laws, then fine. To my best knowledge you can't buy goods abroad for reselling without suffering import tolls that severely impact your profit margins. It's a basic economic safeguard that holds true for most countries in the developed world.
You can import goods privately, to an extent. The extent is usually way below the volume you'd need to set up a business and profit from it.
Another issue is the asked price. If he'd been selling the keys for around $40 then it might be believable that by some way it's possible to make that profitable within legal boundaries. But for below $30? That's about half of what the retail asking price will be, and probably less than what retailers are paying the publisher, domestically, to purchase the product.
Add to that the fact that I know of people who do this kind of thing in Norway too. They'll drive to Poland, buy up loads of CDs and DVDs at an extremely favourable exchange rate, pack the car full, and drive home via some semi deserted forest road where the customs department are unlikely to be at 3 am. Then they underprice the market at home, primarily in online auctions. You see lots of this on ebay too I'm sure.
Thing is, since you're buying solely with the purpose of reselling, this is illegal according to our import laws. There was also a much reported case in Germany about a guy buying thousands of copies of MW2 in Poland and reselling in Germany. He got busted and started something of an online forum crusade to justify his actions. Which doesn't matter - it is illegal - and there are good reasons why, economically.
So don't come accusing me of random slander. This is probably about the most sensible and worked-through conclusion you're likely to find in this thread.