In terms of value probably my ps3 copy of gal gun. It's not really rare but not many people have it in the west. I also have some other japanese games that were never released over here to help me learn some japanese.
Off the top of my head, Oblivion, Valkyria Chonicles. Uncharted 1&2, Mass Effect 2, NIER, Witcher 2, Yakuza3&4, Final Fantasy XIII, Fallout 3, Dragon Age:Origins, Demons/Dark Souls, Heavy Rain, 999, Lux-Pain, The World Ends With You, Pokemon( insert colour here ), Tales of Gaces f, Sakura Wars, Fragile Dream: farewell ruins of the moon, MGS4, Rune Factory oceans, COD 4, Kenka Bancho badass rumble, Peace Walker, Copse Party and many others i can't think of at the moment.
The amount of shit they talk about all modern Final Fantasy games and jrpg's in general. Except for Brad playing FF 13 none of them have gone near them. I have no problem with anyone disliking a game franchise or an entire genre but they really lack knowledge and alot of what they say is infuriating to me when it seems based on pre conceived notions of a genre they don't play. Also while i'm ranting Saints Row 3 is good but not worth all the praise they gave it. It did a good job of building on the solid framework set by SR 2 and nothing much else.
P.S Although i finished red dead i thought it was pretty shit, lacking in variety and way longer then it needed to be. (a problem with all rockstar games) RANT OVER