If you're truly interestd in ACTUAL investment in games collections, you'd be just as mortified with the idea of any kind of expiry method on the game itself. For instance, instead of the value of a new game dropping from $60 to say $40 after it's original purchase, it could become something more like $10, especially since the original serial number that came in the box is no longer usable.

If you don't care about throwing money away in game value, that's totally fine; there's already a saying about fools and their money. However, do keep in mind that there are many game owners out there that ARE interested in things such as asset values for things they've purchased.

I kept about 80% of the games i buy as i only buy games that interest me and know i will really enjoy, so i can play them again years from now. Reviews help me decide to buy a game if i ain't sure

Well I do keep my games for collection purposes so reselling is not the problem but not being able to buy used games would be a huge problem for me!  Most of my PS3 games are preowned (most in great or mint condition)

When I got my PS3 2 years ago I bought like 30 games within the first week and I payed like 500 dollars TOTAL for the system and the games.(I was working really hard in finding the cheapest offer for every single game lol!!)  Almost all were first party games and PS3 exclusives and I dont have to tell you that those are worth more than Fifa 2010 or something. So it was some work but it paid of!

Among the 30 games were Uncharted 1+2+3,  Killzone 2+3, Resistance 2+3, Little Big Planet 2, Yakuza 3+4, 3d dot game heroes, God of War 3, Atelier Totori, Gran Turismo 5, InFamous 1+2, Motorstorm, Ar tonelico qoga, Trinity Universe, Cross Edge, Heavy rain, Ratchet n Clank ToD+QfB+ACiT, Disgaea 3 and numerous other JRPGs  all preowned.

Without the used games market I doubt I would have bought a PS3 at all and neither Sony nor third party would have seen a single cent from my roughly 25 new "non-preowned" games (like Ni no Kuni, Tales of Graces F  etc...) And buying 25 "new" games is still alot.

I keep my games. I don't have as many as some major collectors, but i'm proud of what I have.

I gotta sell my games, Greek guy needs money

Never sold a game, never will. I like to display my games.

Nop, I also keep all my games.
Too bad my mom sold my GC and NES with all the games.

Edit: SNES not NES