For everybody who thinks buying software means ownership, should have a good look again.
Especially games are still not in the so called "First buy" zone, like books, cars etc.
In Europe the court favoured the buyer a while ago, but this is still under debate for all of Europe.
In the US software still is owned by the creator, and you're paying for a license to use it.
In that light, reselling a game is very much in a gray area, as are the stores who do this.
Is the above fair? I have no idea, but I am used to it after using software for a long time. You're not allowed to resell any software atm, as you cannot resell a license for usage.
I may be biased as a software developer, however I create enterprise software not games. Ultimately as a consumer of software regardless how you obtained the software, you are essentially using a brand new product. Unlike a car, you wouldn't know if the software was purchased second hand, new from a store or as a digital download when you are using it. Sure the box it came in may have crumpled edges, but that doesn't affect the 0's and 1's of the binaries stored on the disk. This applies to all forms of software whether it be MS Office, an operating system, PC or console games. The same can be said for music & videos.
In the digital age (opposed to the analogue days where music and video were stored in an analogue format on tapes) there is never any degradation of quality. An audio CD (unless scratched) will sound exactly the same 5 years after you purchased it and a movie on a DVD disc will play like new every time you watch it.
A car on the other hand is a physical product that degrades with age. Regular servicing can keep it running top notch, but that dent on your door and worn tyres show right away that it hasn't just rolled off the factory floor. If you sell your car second hand, what you are selling isn't quite what you purchased. As much as I hate the anti-pirating slogan "you wouldn't steal a car"... I kind of have to agree. If you could buy a car, then somehow with out any effort create identical duplicates why would anyone spend time and money creating one in the first place? Wouldn't someone just come along, make a copy of it then sell it cheaper? After all they didn't have to spend any time and money developing it so they have less to recoup with regards to manufacturing costs.
Movies, music, games etc. are a different kettle of fish. Someone, somewhere had to sit down for some length of time to come up with a crappy story line and pitch it to a studio for development. The studio then throws mountains of money at Tom Cruise to "act" out a character within the story and a movie is born. All this time and money is stored on a DVD which one person pays $20 for. He then sells it to someone who gets to watch this movie at "second hand" prices. The second hand guy isn't getting a second hand movie. As far as the picture on the screen and quality of sound, it may as well be brand new. Same with music and games. This isn't the same as a buying a second hand car with 100,000kms on the clock. Taking this in to account, there is no such thing as second hand digital media. The end product is no different in quality than a brand new one.