Are there any "rare" or "valuable" games

[D.D.D.]

I would say that Persona 3 FES, Odin Sphere, and Grim Grimoire would become quit rare.

Odin Sphere less so, since they just got a greatest hits release. But I'll agree that most of the Atlus titles might start to command high prices down the road, as they tend to have small print runs and are niche titles. Trauma Center excluded, of course.

Yes but remember how much the non-GH version of FF7 still goes for on ebay.

[MrPopo]

Very true. I've personally never cared about Greatest Hits vs. Non Greatest Hits, as they both contain the same code. To me, Greatest Hits only increases the supply, thus decreasing costs. But you are right about how the non Greatest Hits versions can go for higher prices for people that care about that kind of thing.

[RackGaki]

Rare or valuable Wii games aren't going to surface for years. The system is still too young. If anything gains in value, it will be the niche genres like JRPGs and SHMUPs. Everything else fades away.

I would like to say that No More Heroes would be worth something someday, but if Suda51 follows suit with his previous titles, we should be able to procure it for next to nothing before long.

[Curlypaul]

its hard to say what will be valuable, but I think Zack and Wiki, NMH and Trauma Centre are all candidates as cult favourites that will be played and talked about for years.