Basically, unless a game had a limited print run, it's not going to be worth shit in years to come. Even the limited editions are only going to bring in money if they're still sealed. I remember seeing a Gears of War 2 limited edition in my local cex for the whopping sum of £8. And I passed on it. The CoD limited editions with the night vision goggles, remote-controlled car and tactical suitcase nuke (or whatever this year's doodad will be) might appreciate in value in years to come, but let's face it- would you be buying those for the game? I doubt it.