Kspraydad, I believe this title might still be overvalued but only by a small margin if at all. I think you are discounting the international sales of this title too much. According to VGchartz the previous title GTA: Liberty City Stories (PSP) has shipped out many more copies internationally compared to the US.
Grand Theft Auto: Liberty City Stories (PSP) 1.41 million US 2.08 million Other
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Grand Theft Auto: Liberty City Stories (PSP)
1.41 million US
2.08 million Other
http://vgchartz.com/worldtotals.php?name=grand+theft&console=&publisher=&sort=Total