Ken McKown writes: Aftermarket video games are a hot business. The discussion around trading games with friends with this new digital movement is always a hot topic. I grew up trading games with friends, and even now I always attempt to purchase my games physically if given the option. Trading sites are nothing new; there have been several cropping up over the last few years. I recently got a chance to test drive one of the relatively newer entries called LeapTrade. Their motto is that the site was designed by gamers for gamers, which is of course a blanket statement, but after spending some time with it, I tend to agree.